Number | Date | Country | Kind |
---|---|---|---|
56-9957 | Jan 1981 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3050606 | Tibbs | Aug 1962 | |
3705819 | Heller et al. | Dec 1972 | |
3893761 | Buchan et al. | Jul 1975 | |
4081213 | Bar-on et al. | Mar 1978 | |
4112285 | Pan et al. | Sep 1978 |
Number | Date | Country |
---|---|---|
285100 | Sep 1965 | AUX |
1173816 | Dec 1969 | GBX |
Entry |
---|
Xerox Disclosure Journal vol. 2, No. 2, Mar./Apr. 1977, p. 49. |