Number | Name | Date | Kind |
---|---|---|---|
3023192 | Shivers | Feb 1962 | |
3512930 | Bottjer | May 1970 | |
3651014 | Witsiepe | Mar 1972 | |
3763109 | Witsiepe | Oct 1973 | |
3766146 | Witsiepe | Oct 1973 | |
3775373 | Wolfe | Nov 1973 | |
3775374 | Wolfe | Nov 1973 | |
3775375 | Wolfe | Nov 1973 | |
3832314 | Hoh et al. | Aug 1974 | |
3890279 | Wolfe | Jun 1975 | |
3891604 | Wolfe | Jun 1975 | |
3932326 | Hoh et al. | Jan 1976 | |
3941904 | Hoh et al. | Mar 1976 |
Number | Date | Country |
---|---|---|
793,254 | Aug 1968 | CA |
Entry |
---|
Haines, IBM Tech. Discl. Bull., vol. 4, No. 1,6-61. |