Number | Date | Country | Kind |
---|---|---|---|
3714433 | Apr 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3601691 | Gardiner | Aug 1971 | |
4513257 | Miyamoto et al. | Apr 1985 | |
4719362 | Nest et al. | Jan 1988 |
Number | Date | Country |
---|---|---|
1302191 | Jan 1971 | DEX |
2713151 | Sep 1978 | DEX |
2827951 | Jun 1979 | DEX |
3714433 | Nov 1988 | DEX |
Entry |
---|
Donner, "Position Detector", IBM Technical Disclosure Bulletin, vol. 6, No. 5, Oct. 1963, pp. 24-25. |