Number | Date | Country | Kind |
---|---|---|---|
55-186647[U] | Dec 1980 | JPX | |
55-186648[U]JPX | Dec 1980 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
1775610 | Weiss | Sep 1930 | |
2904277 | Underwood | Sep 1959 | |
3132817 | Atwood et al. | May 1964 | |
3512734 | Priest | May 1970 | |
3593933 | Grashorn | Jul 1971 | |
3791604 | Meermans | Feb 1974 |
Number | Date | Country |
---|---|---|
629761 | Jul 1963 | BEX |
2154233 | Aug 1973 | DEX |
Entry |
---|
IBM Technical Disclosure Bulletin, vol. 8, No. 8, Jan. 1966, 1124. |