Number | Name | Date | Kind |
---|---|---|---|
2209178 | Taesler | Jul 1940 | |
2986260 | Whippo | May 1961 | |
2989261 | Gillette et al. | Jun 1961 | |
3349887 | Goff, Jr. | Oct 1967 | |
4264223 | Bemis et al. | Apr 1981 |
Number | Date | Country |
---|---|---|
036308 | Sep 1981 | EPX |
25490 | Mar 1981 | JPX |
2091644 | Aug 1982 | GBX |
Entry |
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Garwin, "Improved Capacity Typewriter Ribbon", IBM Technical Disclosure Bulletin, vol. 22, No. 8A, p. 3469, 1/80. |