Number | Name | Date | Kind |
---|---|---|---|
2863549 | Kelly | Dec 1958 | |
3596594 | Ukitsu et al. | Aug 1971 | |
3814227 | Hurd et al. | Jun 1974 | |
4024506 | Spaargaren | May 1977 | |
4059183 | Hoskins | Nov 1977 | |
4146922 | Brown et al. | Mar 1979 | |
4169684 | Blom | Oct 1979 |
Entry |
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IBM Tech. Disc. Bulletin, by D. K. Rex, vol. 21, No. 1, Jun. 1978, pp. 13-14, 400-124. |
IBM Tech. Disc. Bulletin, by J. E. Lisinski, vol. 21, No. 5, Oct. 1978, p. 1772. |