Number | Name | Date | Kind |
---|---|---|---|
2607649 | Johnson | Aug 1952 | |
3587453 | Klein | Jun 1971 | |
3921539 | Berger | Nov 1975 | |
4872733 | Tedham et al. | Oct 1989 |
Entry |
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Three Copies of Photographs of bottom of IBM PS/2 Model 80 Unit. |
AST Computers Advertisement in PC Week, Feb. 19, 1990, pp. 68-69. |
ALTEC Technology Corp., Advertisement in INFOWORLD, Feb. 5, 1990, p. 88. |
Sys Technology, Inc., Advertisement in PC Week, Feb. 12, 1990, p. 100. |
USM Distributors Advertisement in PC Week, Feb. 19, 1990, p. 111. |