Number | Name | Date | Kind |
---|---|---|---|
1770839 | Carpenter | Jul 1930 | |
2716737 | Maberry | Aug 1955 | |
4002396 | Murdock | Jan 1977 | |
4079440 | Ohnuma et al. | Mar 1978 | |
4117291 | Gebauer | Sep 1978 | |
4245270 | Busby | Jan 1981 | |
4747783 | Bellamy et al. | May 1988 | |
4838799 | Tonooka | Jun 1989 | |
5213517 | Kerek et al. | May 1993 |
Entry |
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IBM Technical Disclosure Bulletin, vol. 32, No. 2, Jul. 1989. |