Number | Name | Date | Kind |
---|---|---|---|
3484341 | Devitt | Dec 1969 | |
3544861 | Kooi | Dec 1970 | |
4004133 | Hannan | Jan 1977 | |
4105156 | Dethloff | Aug 1978 | |
4144523 | Kaplit | Mar 1979 | |
4219827 | Kaiser | Aug 1980 |
Entry |
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Shultis, IBM Technical Discl. Bulletin, vol. 13, No. 7, Dec. 1970, p. 1793. |
Brickman, IBM Technical Discl. Bulletin, vol. 13, No. 7, Dec. 1970, pp. 1927-1928. |