Number | Name | Date | Kind |
---|---|---|---|
844289 | Schuler | Feb 1907 | |
2268867 | Gabrielson et al. | Jan 1942 | |
3346086 | Cralle et al. | Oct 1967 | |
3482671 | Shattuck | Dec 1969 | |
3985220 | Rix et al. | Oct 1976 |
Number | Date | Country |
---|---|---|
2611912 | Sep 1977 | DEX |
1436516 | May 1976 | GBX |
Entry |
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IBM Technical Disclosure Bulletin, "Integrated Forward and Backspace Mechanism," Miles et al., vol. 12, No. 12, May 1970, pp. 2189-2191. |
IBM Technical Disclosure Bulletin, "Backspace for Dual-Pitch Escapement," Lloyd, vol. 22, No. 10, Mar. 1980, pp. 4774-4775. |