This compilation Copyright (C) 2005 Mike Sebastian. No copyright claim is made to original U.S. Government works.
| U.S. Patent No. | Assignee | File Date | Issue Date | Inventor1 | Product | Title | Comments |
| 3725907 | TI | June 1, 1971 | April 3, 1973 | Boulanger | Klixon? | Pushbutton keyboard system | - |
| 3806673 | TI | November 20, 1972 | April 23, 1974 | Boulanger | - | Pushbutton keyboard switch assembly with improved disc spring contact and printed circuit structure | Unrecognized |
| 3819921 | TI | September 29, 1967 | June 25, 1974 | Kilby | CalTech | Miniature electronic calculator | The Kilby/Merryman/Van Tassel patent that started the handheld calculator market |
| 3851313 | TI | February 21, 1973 | November 26, 1974 | Chang | TMS0200/TMS0300 family 16-digit 10-register chip | Memory cell for sequentially addressed memory array | - |
| 3855577 | TI | June 11, 1973 | December 17, 1974 | Vandierendonck | TMS0200/TMS0300 family 16-digit 10-register chip | Power saving circuit for calculator system | - |
| 3887791 | TI | November 8, 1973 | June 3, 1975 | Kitchens | SR-50/51 | Prismatic display window for a calculator | - |
| 3892957 | TI | September 24, 1973 | July 1, 1975 | Bryant | TMS0800 family | Digital mask logic combined with sequentially addressed memory in electronic calculator chip | Calculator chip with mask programmable ROM; includes source code (mostly unreadable) |
| 3893088 | TI | July 19, 1971 | July 1, 1975 | Bell | TMS1802 | Random access memory shift register system | - |
| 3900722 | TI | September 13, 1973 | August 18, 1975 | Cochran | SR-50/51 | Multi-chip calculator system having cycle and subcycle timing generators | Multi-chip calculator system; includes TMC0501 object code |
| 3902054 | TI | September 13, 1973 | August 26, 1975 | Cochran | SR-50/51 | Calculator system having keyboard with double entry protection and serialized encoding | Object code for TMC0501 |
| 3904862 | TI | September 13, 1973 | September 9, 1975 | Cochran | SR-50/51 | Calculator system having a constant memory | Object code for TMC0501 |
| 3904863 | TI | September 13, 1973 | September 9, 1975 | Cochran | SR-50/51 | Calculator system using instruction words as data | Object code for TMC0501 |
| 3909626 | TI | December 28, 1973 | September 30, 1975 | Balasubramaniam | - | Control of axb matrix thermal printhead | Thermal print head driver chip; discussed as being used with TMS0100 |
| 3916169 | TI | September 13, 1973 | October 28, 1975 | Cochran | SR-50/51 | Calculator system having a precharged virtual ground memory | Object code for TMC0501 |
| 3919532 | TI | September 13, 1973 | November 11, 1975 | Cochran | SR-50/51 | Calculator system having an exchange data memory register | Object code for TMC0501 |
| 3919536 | TI | September 13, 1973 | November 11, 1975 | Cochran | SR-50/51 | Precharged digital adder and carry circuit | Object code for TMC0501 |
| 3921142 | TI | September 24, 1973 | November 18, 1975 | Bryant | TMS0800 family | Electronic calculator chip having test input and output | Includes source code |
| 3922538 | TI | September 13, 1973 | November 25, 1975 | Cochran | SR-50/51 | Calculator system featuring relative program memory | Object code for TMC0501 |
| 3924110 | TI | September 13, 1973 | December 2, 1975 | Cochran | SR-50/51 | Calculator system featuring a subroutine register | - |
| 3931507 | TI | November 26, 1974 | January 6, 1976 | Brantingham | integrated injection logic (I2L) | Power-up clear in an electronic digital calculator | With source code |
| 3932846 | TI | September 24, 1973 | January 13, 1976 | Brixey | TMS0800 family | Electronic calculator having internal means for turning off display | - |
| 3934229 | TI | December 10, 1973 | January 20, 1976 | Cochran | TMS0800 family | External register memory chip in a calculator system | - |
| 3934233 | TI | September 24, 1973 | January 20, 1976 | Fisher | TMS0800 family | Read-only-memory for electronic calculator | Includes source code |
| 3937940 | TI | November 26, 1974 | February 10, 1976 | Brantingham | integrated injection logic (I2L) | Direct compare in an electronic digital calculator | Includes source code |
| 3939335 | TI | November 26, 1974 | February 17, 1976 | Brantingham | integrated injection logic (I2L) | Universal condition latch in an electronic digital calculator | Includes source code |
| 3944983 | TI | June 11, 1973 | March 16, 1976 | Gale | TMS0200/TMS0300 family 16-digit 10-register chip | Expandable data storage for a calculator system | - |
| 3946216 | TI | September 24, 1973 | March 23, 1976 | Vandierendonck | TMS0800 family | Electronic calculator system having serial transfer of instruction word fields to decode arrays | - |
| 3946852 | TI | March 11, 1974 | March 30, 1976 | Watson | - | Printer | Daisy wheel printer for a calculator |
| 3949367 | TI | December 28, 1973 | April 6, 1976 | Cochran | - | Drum printer control | Printer controller chip that interfaces to TMS0200/TMS0300 chipset (SR-50) |
| 3952174 | TI | November 29, 1974 | April 20, 1976 | Boulanger | plastic bkpl kbd | Pushbutton keyboard system | Plastic backplane keyboard |
| 3953719 | TI | November 26, 1974 | April 27, 1976 | Brantingham | integrated injection logic (I2L) | Latched decoder for digital outputs to an electronic digital calculator display | Includes source code |
| 3955181 | TI | November 19, 1974 | May 4, 1976 | Raymond | TMS0100 family | Self-refreshing random access memory cell | - |
| 3956620 | TI | November 26, 1974 | May 11, 1976 | Brantingham | integrated injection logic (I2L) | Adder with carry enable for bit operations in an electric digital calculator | Includes source code |
| 3958223 | TI | June 11, 1973 | May 18, 1976 | Cochran | TMS0200/TMS0300 family 16-digit 10-register chip | Expandable data storage in a calculator | - |
| 3959611 | TI | January 10, 1975 | May 25, 1976 | Greene | klixon kbd | Pushbutton keyboard system having plural level wire-like contact | - |
| 3962571 | TI | November 26, 1974 | June 8, 1976 | Brantingham | integrated injection logic (I2L) | Low power digit blanking circuit | Includes source code |
| 3967104 | TI | November 26, 1974 | June 29, 1976 | Brantingham | integrated injection logic (I2L) | Direct and indirect addressing in an electronic digital calculator | Includes source code |
| 3970995 | TI | February 27, 1974 | July 20, 1976 | Baudouin | TMS0100 family | Slaving calculator chips | - |
| 3973091 | TI | February 3, 1975 | August 3, 1976 | Kaminski | ? | Pushbutton keyboard assembly having pole and inner contacts simultaneously engaged by a bridging contact | - |
| 3976975 | TI | February 4, 1974 | August 24, 1976 | Cochran | SR-60? | Prompting calculator | - |
| 3984816 | TI | May 22, 1972 | October 5, 1976 | Cochran | TMS0200/TMS0300 family | Expandable function electronic calculator | - |
| 3986185 | TI | December 23, 1974 | October 12, 1976 | Bylander | ? | Gas discharge display with control cells | - |
| 3987416 | TI | September 24, 1973 | October 19, 1976 | Vandierendonck | TMS0800 family | Electronic calculator with display and keyboard scanning signal generator in data memory | Calculator chip with display and keyboard matrix scanning |
| 3988604 | TI | November 19, 1974 | October 26, 1976 | Raymond | TMS1000 family | Electronic calculator or digital processor chip having multiple function arithmetic unit output | - |
| 3989939 | TI | November 19, 1974 | November 2, 1976 | Raymond | TMS1000 family | Electronic calculator or digital processor chip with combined functions for constant, keyboard and control bit | - |
| 3991305 | TI | November 19, 1974 | November 9, 1976 | Caudel | TMS1000 family | Electronic calculator or digital processor chip with multiple code combinations of display and keyboard scan outputs | - |
| 3991306 | TI | November 19, 1974 | November 9, 1976 | Raymond | TMS1000 family | Electronic calculator or digital processor chip with separately controllable digit and segment outputs | - |
| 3995128 | TI | January 10, 1975 | November 30, 1976 | Hawkins | ? | Pushbutton keyboard system having preformed recessed support with contacts mounted on face and in recesses | - |
| 3996427 | TI | January 10, 1975 | December 7, 1976 | Kaminski | ? | Pushbutton keyboard system and method of making same | - |
| 4000393 | TI | August 29, 1974 | December 28, 1976 | Cochran | - | Thermal printhead assembly | - |
| 4004280 | TI | June 11, 1973 | January 18, 1977 | Vandierendonck | TMS0200/TMS0300 family 16-digit 10-register chip | Calculator data storage system | - |
| 4005293 | TI | November 29, 1974 | January 25, 1977 | Boulanger | plastic bkpl kbd | Pushbutton keyboard switch assembly having individual concave-convex contacts integrally attached to conductor strips | Plastic backplane keyboard |
| 4005299 | TI | April 29, 1974 | January 25, 1977 | Keough | Klixon? | Electrical contact member having low electrical resistance | - |
| 4005928 | TI | June 1, 1971 | February 1, 1977 | Kmetz | ? | Nematic liquid crystal displays for low voltage direct current operation | - |
| 4006455 | TI | October 10, 1975 | February 1, 1977 | Hamilton | SR-60 | Error correction system in a programmable calculator | - |
| 4014012 | TI | April 7, 1975 | March 22, 1977 | Caudel | TI-1200/TMS0952 | Segment scanning method for calculator display system | Direct drive calculator chip using sequential segment scanning technique (as opposed to the more common sequential digit scanning) |
| 4014013 | TI | April 7, 1975 | March 22, 1977 | McElroy | TI-1200/TMS0952 | Direct drive display system for mos integrated circuits using segment scanning | Direct drive calculator chip using sequential segment scanning technique (as opposed to the more common sequential digit scanning) |
| 4020465 | TI | December 26, 1973 | April 26, 1977 | Cochran | SR-60? | Thermal line printer | - |
| 4021656 | TI | November 19, 1974 | May 3, 1977 | Caudel | TMS1000 family | Data input for electronic calculator or digital processor chip | - |
| 4021781 | TI | November 19, 1974 | May 3, 1977 | Caudel | TMS1000 family | Virtual ground read-only-memory for electronic calculator or digital processor | - |
| 4024386 | TI | November 19, 1974 | May 17, 1977 | Caudel | TMS1000 family | Electronic calculator or digital processor chip having test mode of operation | - |
| 4037090 | TI | November 19, 1974 | July 19, 1977 | Raymond | TMS1000 family | Multiphase clocking for mos | - |
| 4038535 | TI | January 5, 1976 | July 26, 1977 | Aldridge | PC-100 | Calculator-printer cradle system | Print cradle for scientific calculators |
| 4046981 | TI | December 24, 1975 | September 6, 1977 | Johnson | ? | Keyboard switch with printed wiring board structure and its method of manufacture | - |
| 4048624 | TI | September 13, 1973 | September 13, 1977 | Cochran | SR-50/51 | Calculator system having multi-function memory instruction register | - |
| 4053795 | TI | July 6, 1976 | October 11, 1977 | Cochran | SR-52? | Low level field effect transistor amplifier | Card reader amplifier |
| 4059826 | TI | December 29, 1975 | November 22, 1977 | Rogers | TMS0100 family | Semiconductor memory array with field effect transistors programmable by alteration of threshold voltage | MOS mask programmable ROM |
| 4064554 | TI | August 16, 1976 | December 20, 1977 | Tubbs | TI-30/TMC0981 | Microcomputer with code conversion | - |
| 4068369 | TI | January 10, 1975 | January 17, 1978 | Kaminski | ? | Method of making pushbutton keyboard system | - |
| 4073006 | TI | July 19, 1976 | February 7, 1978 | Tubbs | TI-30/TMC0981 | Digital processor system with simultaneous branch and op code function | - |
| 4074088 | TI | May 21, 1974 | February 14, 1978 | Keough | ? | Keyboard apparatus and method of making | - |
| 4074351 | TI | July 19, 1971 | February 14, 1978 | Boone | TMS1802 | Variable function programmed calculator | Includes source and object code |
| 4074355 | TI | August 16, 1976 | February 14, 1978 | Tubbs | TI-30/TMC0981 | Digital microprocessor system with shared decode | - |
| 4074419 | TI | March 16, 1976 | February 21, 1978 | Hanni | - | Printed wiring board with angled portion and its method of manufacture | PCB base is metal plate with insulating layer and then conductive traces; metal plate can be bent such as to angle the display (related 4109298, 3934334) |
| 4078251 | TI | October 27, 1976 | March 7, 1978 | Hamilton | TI-57 | Electronic calculator or microprocessor with mask logic effective during data exchange operation | Includes object code |
| 4079459 | TI | October 27, 1976 | March 14, 1978 | Grant | TI-57 | Two speed shift register for electronic calculator or microprocessor system | Includes object code |
| 4081898 | TI | April 19, 1976 | April 4, 1978 | Taylor | - | Method of manufacturing an electronic calculator utilizing a flexible carrier | (unrecognized) |
| 4082966 | TI | December 27, 1976 | April 4, 1978 | Lou | - | MOS detector or sensing circuit | Circuit for reading keyboard inputs or ROMS where signal may not be switched to a full logic level |
| 4084173 | TI | July 23, 1976 | April 11, 1978 | Fantechi | SR-52 | Interdigitated transistor pair | MOS FET transistors used in magnetic card reader amplifier |
| 4089062 | TI | June 28, 1976 | May 9, 1978 | McElroy | TI-30/TMC0981 | Switching control circuits for electronic calculator with push-button on-off system | - |
| 4092527 | TI | January 31, 1977 | May 30, 1978 | Luecke | Able-IV | Calculator with interchangeable keyset | - |
| 4100600 | TI | October 27, 1976 | July 11, 1978 | Miles | TI-57 | Data display system for electronic calculator or microprocessor | Includes object code |
| 4100606 | TI | February 9, 1977 | July 11, 1978 | Brantingham | TI-1050/TMS0920 | Key debounce system for electronic calculator or microprocessor | With source code |
| 4107781 | TI | October 27, 1976 | August 15, 1978 | Barrett | TI-57 | Electronic calculator or microprocessor with indirect addressing | Includes object code |
| 4107782 | TI | October 10, 1975 | August 15, 1978 | Cochran | SR-60 | Prompting programmable calculator | - |
| 4112495 | TI | February 9, 1977 | September 5, 1978 | Easley | TI-1050/TMS0920 | Electronic calculator or microprocessor having a selectively loadable instruction register | Includes source code |
| 4115705 | TI | June 14, 1976 | September 19, 1978 | McElroy | TI-30/TMC0981 | Electronic calculator with push-button on-off system | Calculator with ON and OFF keys, such as the TI-30 |
| 4118858 | TI | April 19, 1976 | October 10, 1978 | Taylor | - | Method of making an electronic calculator | (unrecognized) |
| 4121760 | TI | December 28, 1973 | October 24, 1978 | Cochran | SR-22 (TMS0207, TMS0323, TMS0404) | Electronic multibase calculator | Includes object code |
| 4123627 | TI | December 6, 1976 | October 31, 1978 | Boulanger | plastic bkpl kbd | Keyboard apparatus | Plastic backplane keyboard |
| 4125830 | TI | December 26, 1973 | November 14, 1978 | Cochran | SR-60? | Alphanumeric display system | - |
| 4125867 | TI | October 27, 1976 | November 14, 1978 | Cochran | TI-57 | Electronic calculator or microprocessor having a hexadecimal/binary coded decimal arithmetic unit | Includes object code |
| 4125901 | TI | October 27, 1976 | November 14, 1978 | Merrow | TI-57 | Electronic calculator or microprocessor having a multi-input arithmetic unit | Includes object code |
| 4125934 | TI | May 21, 1974 | November 21, 1978 | Keough | ? | Keyboard apparatus and method of making | - |
| 4139893 | TI | August 16, 1976 | February 13, 1979 | Poland | TI-58/59 SSSW & mag crd | Calculator program security system | - |
| 4141075 | TI | April 19, 1976 | February 20, 1979 | Taylor | - | Method of making an electronic calculator | (unrecognized) |
| 4145756 | TI | December 26, 1973 | March 20, 1979 | Cochran | SR-60? | Thermal line printer | Incorporates 4,020,465 by reference |
| 4146928 | TI | October 27, 1976 | March 27, 1979 | Miles | TI-57 | Power up clear system for an electronic calculator or microprocessor | Includes object code |
| 4153937 | TI | August 16, 1976 | May 8, 1979 | Poland | TI-58/59 SSSW | Microprocessor system having high order capability | Microprocessor based calculator with internal ROM and user replaceable ROM; includes object code |
| 4153987 | TI | December 9, 1974 | May 15, 1979 | Boulanger | ? | Method for assembling keyboard | - |
| 4156927 | TI | August 11, 1976 | May 29, 1979 | McElroy | TI-30/TMC0981 | Digital processor system with direct access memory | - |
| 4158431 | TI | December 10, 1976 | June 19, 1979 | vanBavel | TMS0100 family | Self-test feature for appliances or electronic systems operated by microprocessor | - |
| 4158432 | TI | December 10, 1976 | June 19, 1979 | vanBavel | TMS0100 family | Control of self-test feature for appliances or electronic equipment operated by microprocessor | - |
| 4164031 | TI | November 26, 1976 | August 7, 1979 | Lou | ? | Memory system | - |
| 4164037 | TI | October 27, 1976 | August 7, 1979 | Cochran | TI-57 | Electronic calculator or microprocessor system having combined data and flag bit storage system | Includes object code |
| 4170422 | TI | February 3, 1975 | October 9, 1979 | Bilek | TI-5050? | Printhead alignment mechanism | - |
| 4175286 | TI | January 19, 1978 | November 20, 1979 | Hunter | TI-5015/TMS1118 | Burn-in test system for electronic apparatus | With source code, describes specific key combination for self-test burn-in |
| 4179746 | TI | July 19, 1976 | December 18, 1979 | Tubbs | TI-30/TMC0981 | Digital processor system with conditional carry and status function in arithmetic unit | - |
| 4181964 | TI | July 2, 1975 | January 1, 1980 | Moore | - | Integrated electronics assembly on a plastic chassis | (unrecognized) |
| 4188626 | TI | May 23, 1977 | February 12, 1980 | Frantz | 1st gen LCD? | Method for scanning a keyboard and for actuating a display device via common conductors | - |
| 4190897 | TI | January 1, 1977 | February 26, 1980 | Someshwar | TI-58/59 SSSW | Binary coded decimal addressed read-only-memory | - |
| 4200926 | TI | May 22, 1972 | April 29, 1980 | Cochran | TMS0200/TMS0300 family | Electronic calculator implemented in semiconductor lsi chips with scanned keyboard and display | Includes source and object code |
| 4208720 | TI | July 26, 1976 | June 17, 1980 | Harrison | AOS | Calculator with algebraic operating system | Algebraic logic Operating System (AOS); includes source code |
| 4209836 | TI | July 17, 1977 | June 24, 1980 | Wiggins | Speak&Spell | Speech synthesis integrated circuit device | - |
| 4216522 | TI | June 6, 1977 | August 5, 1980 | Slagel | TI-58/59 SSSW | Interchangeable module for integrated circuits | Solid-State-Software ROM module |
| 4224615 | TI | September 14, 1978 | September 23, 1980 | Penz | - | Method of using a liquid crystal display device as a data input device | (unrecognized) |
| 4242675 | TI | July 19, 1971 | December 30, 1980 | Boone | TMS1802 | Display and keyboard scanning for electronic calculation or the like | Includes source and object code (almost unreadable) |
| 4242735 | TI | December 28, 1973 | December 30, 1980 | Sexton | TMS0200/TMS0300 family | Calculator-printer interface with numerical string segmentation | - |
| 4254309 | TI | April 19, 1976 | March 3, 1981 | Johnson | ? | Snap-through characteristic keyboard switch | - |
| 4258429 | TI | November 19, 1974 | March 24, 1981 | Raymond | TMS1000 family | Multiphase clocking for mos electronic calculator or digital processor chip | - |
| 4264963 | TI | June 8, 1979 | April 28, 1981 | Leach | 1st gen LCD, TI-50 | Static latches for storing display segment information | - |
| 4267578 | TI | August 26, 1974 | May 12, 1981 | Vetter | - | Calculator system with anti-theft feature | Use of PIN; unrecognized |
| 4277675 | TI | October 27, 1976 | July 7, 1981 | Mar | TI-57? | Non-sequential counter | Includes object code |
| 4277827 | TI | January 2, 1979 | July 7, 1981 | Carlson | TI-58/59 SSSW | Microprocessor based system for the development and emulation of programmable calculator control read only memory software | - |
| 4282597 | TI | November 28, 1977 | August 4, 1981 | Yenawine | Digital Watch | Metal-coated plastic housing for electronic components and the method of making same (watch case) | - |
| 4287559 | TI | February 9, 1977 | September 1, 1981 | Easley | TI-1050/TMS0920 | Electronic microprocessor system having two cycle branch logic | With source code |
| 4290121 | TI | July 19, 1971 | September 15, 1981 | Boone | TMS1802 | Variable function programmed calculator | - |
| 4295181 | TI | January 15, 1979 | October 13, 1981 | Chang | Speak & Spell | Module for an integrated circuit system | Educational |
| 4298949 | TI | August 16, 1976 | November 3, 1981 | Poland | TI-58/59 SSSW | Electronic calculator system having high order math capability | - |
| 4308017 | TI | January 6, 1979 | December 29, 1981 | Laughon | Spelling B | Electronic learning aid with picture book | Educational word game utilizes calculator architecture |
| 4317180 | TI | December 26, 1979 | February 23, 1982 | Lies | 1st gen LCD, TI-50 | Clocked logic low power standby mode | - |
| 4317181 | TI | December 26, 1979 | February 23, 1982 | Teza | 1st gen LCD, TI-50 | Four mode microcomputer power save operation | - |
| 4326265 | TI | July 19, 1971 | April 20, 1982 | Boone | TMS1802 | Variable function programmed calculator | - |
| 4327953 | TI | June 6, 1977 | May 4, 1982 | Slagel | TI-58/59 SSSW | Interchangeable module for integrated circuits | Solid-State-Software ROM module |
| 4335275 | TI | April 28, 1978 | June 15, 1982 | Brantingham | Speak&Spell | Synchronous method and apparatus for speech synthesis circuit | - |
| 4340374 | TI | October 7, 1977 | July 20, 1982 | Culley | Dataman | Electronic learning aid | - |
| 4340871 | TI | September 14, 1979 | July 20, 1982 | Teza | 1st gen LCD, TI-50 | Low power oscillator having clamping transistors across its timing capacitors | - |
| 4342094 | TI | July 19, 1971 | July 27, 1982 | Boone | TMS1802 | Display method for variable function programed system | - |
| 4344148 | TI | June 17, 1977 | August 10, 1982 | Brantingham | Speak&Spell | System using digital filter for waveform or speech synthesis | - |
| 4348733 | TI | July 26, 1976 | September 7, 1982 | Harrison | AOS | Calculator with algebraic operating system | Algebraic logic Operating System (AOS); includes source code |
| 4352963 | TI | August 5, 1980 | October 5, 1982 | De Filippis | - | Low profile microswitches, particularly useful for the composition of keyboards and methods of making | Low cost snap-disk keyboard construction |
| 4354068 | TI | February 4, 1980 | October 12, 1982 | Sobol | - | Long travel elastomer keyboard | (various non-handheld keyboards) |
| 4360716 | TI | October 1, 1980 | November 23, 1982 | Fiorella | ? | Area actuated switch array | Educational |
| 4361873 | TI | June 11, 1979 | November 30, 1982 | Harper | 1st gen LCD, TI-50 | Calculator with constant memory | - |
| 4369498 | TI | January 19, 1981 | January 18, 1983 | Schulte | - | Photoluminescent powered calculator | (not sold) |
| 4380371 | TI | May 23, 1977 | April 19, 1983 | Frantz | 1st gen LCD? | Liquid crystal display device | - |
| 4383184 | TI | January 26, 1980 | May 10, 1983 | McFarland | TI-88 | Power controller | - |
| 4385366 | TI | September 2, 1980 | May 24, 1983 | Housey | - | Programmable device using selectively connectible memory module to simultaneously define the functional capability and the display associated with input switches | ROM cartridges have key legends visible through thin/transparent keyboard |
| 4409665 | TI | December 26, 1979 | October 11, 1983 | Tubbs | 1st gen LCD, TI-50 | Turn-off-processor between keystrokes | - |
| 4411628 | TI | September 11, 1981 | October 25, 1983 | Laughon | Spelling B | Electronic learning aid with picture book | Educational word game utilizes calculator architecture |
| 4418397 | TI | May 29, 1980 | November 29, 1983 | Brantingham | TI-88 | Address decode system | - |
| 4421487 | TI | October 7, 1981 | December 20, 1983 | Laughon | Mr Challenger | Electronic learning aid and game | Educational word game utilizes calculator architecture |
| 4430584 | TI | May 29, 1980 | February 7, 1984 | Someshwar | TI-88 | Modular input/output system | - |
| 4430724 | TI | June 26, 1980 | February 7, 1984 | Hamilton | TI-88 | Memory interface system having combined command, address and data bus | - |
| 4435775 | TI | January 19, 1981 | March 6, 1984 | Brantingham | TI-88 | Data processing system having interlinked slow and fast memory means | - |
| 4443845 | TI | June 26, 1980 | April 17, 1984 | Hamilton | TI-88 | Memory system having a common interface | - |
| 4447881 | TI | May 29, 1980 | May 8, 1984 | Brantingham | TI-88 | Data processing system integrated circuit having modular memory add-on capacity | - |
| 4454591 | TI | May 29, 1980 | June 12, 1984 | Lou | TI-88 | Interface system for bus line controller | - |
| 4459565 | TI | June 9, 1980 | June 10, 1984 | Leach | - | Low current electronic oscillator system | - |
| 4471460 | TI | July 19, 1971 | September 11, 1984 | Boone | TMS1802 | Variable function programmed system | - |
| 4471461 | TI | July 19, 1971 | September 11, 1984 | Boone | TMS1802 | Variable function programmed system | - |
| 4473886 | TI | July 6, 1981 | September 25, 1984 | Rizk | TI-55II | Data processing apparatus with algebraic memory operation and entry sequence | - |
| 4475165 | TI | July 6, 1981 | October 2, 1984 | Rizk | TI-55II | Method of data entry and execution of a two variable calculator function in the same manner and entry format as a single variable function | - |
| 4476541 | TI | July 19, 1971 | October 9, 1984 | Boone | TMS1802 | Variable function programmed system | - |
| 4484261 | TI | January 19, 1981 | November 20, 1984 | Brantingham | TI-88 | Data processing system having interlinked fast and slow memory means and interlinked program counters | - |
| 4485455 | TI | July 19, 1971 | November 27, 1984 | Boone | TMS1802 | Single-chip semiconductor unit and key input for variable function programmed system | - |
| 4491938 | TI | December 28, 1981 | January 1, 1985 | Leach | TMS0100 family | Low voltage RAM cell | - |
| 4495426 | TI | December 24, 1981 | January 22, 1985 | Leach | TMS0100 family | Low power inverter circuit | - |
| 4495592 | TI | May 25, 1982 | January 22, 1985 | Caldwell | TI-88/EOS? | Electronic data processing apparatus with equation operating system having implied multiplication of two hierarchical ranks | - |
| 4503494 | TI | June 26, 1980 | March 5, 1985 | Hamilton | TI-88 | Non-volatile memory system | - |
| 4507745 | TI | December 21, 1981 | March 26, 1985 | Agrawal | - | Data processing apparatus having alterable interest rate mode capability | (unrecognized, not BA-55) |
| 4516218 | TI | June 26, 1980 | May 7, 1985 | Hamilton | TI-88 | Memory system with single command selective sequential accessing of predetermined pluralities of data locations | - |
| 4519045 | TI | May 25, 1982 | May 21, 1985 | Caldwell | TI-88/EOS? | Electronic data processing apparatus with equation operating system having improved unary operation implementation | - |
| 4521868 | TI | May 25, 1982 | June 4, 1985 | Caldwell | TI-88/EOS? | Electronic data processing apparatus with equation operating system having improved exponentiation operators | - |
| 4535465 | TI | December 24, 1981 | August 13, 1985 | Leach | TMS0100 family | Low power clock generator | - |
| 4560954 | TI | December 24, 1981 | December 24, 1985 | Leach | TMS0100 family | Low power oscillator circuit | - |
| 4587634 | TI | December 20, 1982 | May 6, 1986 | Ferrio | CC40 | Data processing apparatus for multiple mode operation as specified by user inputs | - |
| 4593279 | TI | December 24, 1981 | June 3, 1986 | Leach | TMS0100 family | Low power liquid crystal display driver circuit | - |
| 4598383 | TI | December 28, 1981 | July 1, 1986 | Leach | TMS0100 family | Combination of a data processor with a switch means | Improved ON/OFF key that is part of keyboard matrix and reduces power consumption in the OFF state |
| 4635354 | TI | July 22, 1982 | January 13, 1987 | Chrobak | - | Low cost electronic apparatus construction method | (unrecognized) |
| 4703160 | TI | June 14, 1985 | October 27, 1987 | Narishima | - | Casing structure of portable electronic appliance | (unrecognized) |
| 4724605 | TI | October 1, 1980 | February 16, 1988 | Fiorella | ? | Method of making area actuated switch | Educational |
| 4736190 | TI | November 1, 1982 | April 5, 1988 | Fiorella | ? | Sheet membrane keyboard and electronic apparatus using same | Educational? |
| 4823311 | TI | May 30, 1986 | April 18, 1989 | Hunter | TI-95 | Calculator keyboard with user definable function keys and with programmably alterable interactive labels for certain function keys | - |
| 4831569 | TI | July 23, 1984 | May 16, 1989 | Duriez | - | Display system for indicating standby operations of electronic data processing apparatus | Displays pending operators for an educational calculator |
| 4885574 | TI | June 19, 1985 | December 5, 1989 | Negishi | - | Display and keyboard panel | (unrecognized) |
| 4954977 | TI | August 12, 1988 | September 4, 1990 | Colombat | Galaxy 9/9x/40/40x, Math Explorer/+ | Pedagogic calculating machine for arithmetic instruction | Calculator with zoned display for quotient and remainder results of integer divide function |
| 5135398 | TI | July 31, 1990 | August 4, 1992 | Thornton | Super Speak & Math | Electronic teaching device | - |
| 5137457 | TI | July 31, 1990 | August 11, 1992 | Howard | Super Speak & Math | Electronic teaching device | - |
| 5139423 | TI | July 31, 1990 | August 18, 1992 | McCormack | Super Speak & Math | Electronic teaching device | - |
| 5168294 | TI | September 7, 1990 | December 1, 1992 | Davis | Graphing overhead display | Display demonstration system for providing enlarged projected image of calculator display | Graphing calculator overhead projector display |
| 5377130 | TI | January 26, 1993 | December 27, 1994 | Frank | Galaxy 67, TI-82 | Method and apparatus for solving terms of a numerical sequence | - |
| 5392081 | TI | September 29, 1993 | February 21, 1995 | Tarnay | Graphing overhead display | Calculator projection display | Graphing calculator overhead projector display |
| 5532946 | TI | September 29, 1993 | July 2, 1996 | Phipps | TI-82 | Calculator with table generation capability | - |
| 5870319 | TI | January 4, 1996 | February 9, 1999 | Thornton | TI-92 | Device and method for collecting data from graphed images | - |
| 6650317 | TI | July 19, 1971 | November 18, 2003 | Boone | TMS1802 | Variable function programmed calculator | Includes source and object code |
| 6704013 | TI | December 1, 2000 | March 9, 2004 | Hosea | - | Function graphing method with detection of discontinuities | (graphing calculator) |
| 6771252 | TI | December 20, 2000 | August 3, 2004 | Miller | - | Shading of inequalities on a graphing calculator | (graphing calculator) |
| 6867777 | TI | December 20, 2000 | March 15, 2005 | Miller | - | Tracing and storing points of interest on a graphing calculator | (graphing calculator) |
| 6874005 | TI | December 28, 2001 | March 29, 2005 | Fortenberry | TI-89/92+ | Subexpression selection of expression represented in contiguous tokenized polish representation | (graphing calculator) |
| 6889362 | TI | September 7, 2001 | May 3, 2005 | Wattenberg | - | User interface for graphical specification of functions | (graphing calculator) |
| 6891541 | TI | March 27, 2000 | May 10, 2005 | Harris | - | Graphing calculator with manual line drawing | (graphing calculator) |
| 6922710 | TI | November 8, 2001 | July 26, 2005 | Child | TI-89/92+ | Hand-held calculator with problems and operations linked lists | Math tutoring software for use on a graphing calculator |
| 6938060 | TI | December 27, 2001 | August 30, 2005 | Good | TI-83 Plus | Apparatus and method for graphically displaying a vector simultaneously along with the numerical values of its vector components | (graphing calculator) |
| 6956560 | TI | August 24, 2001 | October 18, 2005 | Brothers | TI-89/92+ | Selection of mathematical objects from the history screen on a handheld device | (graphing calculator) |
| 6968208 | TI | November 26, 2002 | November 22, 2005 | Kacines | - | Data storage for a portable computer device | Memory or wireless transceiver in a rechargeable battery pack is used to transfer data to graphing calculators in the classroom |
| 7042713 | TI | September 7, 2004 | May 9, 2006 | Nicolosi | - | Slide case with pivotable stand member for handheld computing device | Slide-on cover has hinged support that can be raised to support calculator and a convenient viewing angle |
| H1970 | TI | July 19, 1971 | June 5, 2001 | Boone | TMS1802 | Variable function programmed system | Includes source and object code |
| RE30671 | TI | August 16, 1976 | July 7, 1981 | Poland | TI-58/59 SSSW | Microprocessor system having high order capability | Reissue of 4153937 |
| RE31864 | TI | December 10, 1976 | April 9, 1985 | vanBavel | TMS0100 family | Self-test feature for appliances or electronic systems operated by microprocessor | Reissue of 4158431 |
Last updated November 5, 2006
