Number | Date | Country | Kind |
---|---|---|---|
5-143062 | May 1993 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2877439 | Avery | Sep 1953 | |
3622936 | Negishi | Nov 1971 |
Number | Date | Country |
---|---|---|
0995320 | Aug 1976 | CAX |
59-28983 | Feb 1984 | JPX |
61-12407 | Jun 1986 | JPX |
Entry |
---|
IBM Technical Disclosure Bulletin vol. 13, No. 9, Feb. 1971 to Walsh. |