Number | Name | Date | Kind |
---|---|---|---|
1590998 | Balston | Jun 1926 | |
2318519 | Palanque | May 1943 | |
3225883 | Ayres | Dec 1965 | |
3892958 | Tung | Jul 1975 | |
3967273 | Knowlton | Jun 1976 | |
4041295 | Ido et al. | Aug 1977 | |
4042777 | Bequaert et al. | Aug 1977 | |
4067431 | Whitaker | Jan 1978 | |
4202038 | Peterson | May 1980 | |
4272826 | Deutsch | Jun 1981 | |
4344069 | Prame | Aug 1982 | |
4360892 | Endfield | Nov 1982 | |
4400593 | Kunz | Aug 1983 | |
4412210 | Washizuka et al. | Oct 1983 |
Number | Date | Country |
---|---|---|
2924515 | Jun 1979 | DEX |
490000 | Aug 1938 | GBX |
511240 | Aug 1939 | GBX |
Entry |
---|
Beausoleil et al., "Compact Keyboard", IBM Tech. Disclosure Bulletin, vol. 13, No. 11, Apr. 1971, p. 3574. |
Number | Date | Country | |
---|---|---|---|
Parent | 528975 | Sep 1983 |
Number | Date | Country | |
---|---|---|---|
Parent | 493613 | May 1983 |