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 |
| 3978328 | National Semiconductor | April 7, 1975 | August 31, 1976 | Fabry | - | Pocket calculator | Replaceable processor modules |
| 4048524 | National Semiconductor | April 21, 1976 | September 13, 1977 | Laugesen | - | MOS voltage level detecting and indicating apparatus | Low-voltage circuit for direct-drive MOS calculator chip |
| 4051605 | National Semiconductor | September 7, 1976 | October 4, 1977 | Toal | - | Competitive educational calculator | - |
| 4075702 | National Semiconductor | March 12, 1976 | February 21, 1978 | Davies | - | Electronic calculator apparatus and wallet enclosure | - |
| 4126949 | National Semiconductor | September 19, 1977 | November 28, 1978 | Simone | Quiz Kid | Educational calculator | - |
| 4171537 | National Semiconductor | January 9, 1978 | October 16, 1979 | Weissberger | MM57109 | Number oriented processor | Calculator chip without keyboard and display support intended to be a peripheral math coprocessor for early computers |
| 4179748 | National Semiconductor | July 16, 1975 | December 18, 1979 | Brown | MM5765 | Programmer and method of storing information therein and accessing information therefrom | - |
Last updated November 5, 2006
