Number | Name | Date | Kind |
---|---|---|---|
3560964 | Bedell et al. | Feb 1971 | |
3956745 | Ellis | May 1976 | |
4336530 | Koike et al. | Jun 1982 | |
4855746 | Stacy | Aug 1989 | |
4862497 | Seto et al. | Aug 1989 | |
4878055 | Kasahura | Oct 1989 | |
4879557 | Roche | Nov 1989 | |
4890832 | Komaki | Jan 1990 |
Entry |
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D. O. Johnson, Jr., "Keyboard With Changeable Encoding and Key Designation", IBM Technical Disclosure Bulletin, vol. 13, No. 7, Dec. 1970, pp. 2041-2042. |