Number | Date | Country | Kind |
---|---|---|---|
56-117082[U] | Aug 1981 | JPX | |
56-117083[U] | Aug 1981 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2593337 | O'Brien | Apr 1952 | |
3222467 | Meyer | Dec 1965 | |
3254163 | Wanlass | May 1966 | |
3288947 | Wanlass et al. | Nov 1966 | |
4065650 | Lou | Dec 1977 |
Entry |
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Xerox Disclosure Bulletin, Kowalski, D.C., Semi-Captive Keyboard, vol. 1, No. 2, Feb. 1976, p. 85. |