Number | Date | Country | Kind |
---|---|---|---|
53/138442 | Nov 1978 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3143921 | Russell | Aug 1964 | |
3594160 | Gunto et al. | Jul 1971 | |
4218134 | Kamiya et al. | Aug 1980 |
Number | Date | Country |
---|---|---|
2350281 | Apr 1975 | DEX |
60142 | May 1977 | JPX |
Entry |
---|
I.B.M. Technical Disclosure Bulletin, vol. 15, No. 2, Jul. 1972, p. 522. |