Number | Date | Country | Kind |
---|---|---|---|
9007327 | Mar 1990 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
2449113 | Fruth | Sep 1948 | |
2534762 | Epstein | Dec 1950 | |
3248586 | Schlegel | Apr 1966 | |
4767965 | Yamano et al. | Aug 1988 |
Number | Date | Country |
---|---|---|
8800758 | Jan 1988 | WOX |
8912905 | Dec 1989 | WOX |
9009676 | Aug 1990 | WOX |
326532 | Mar 1930 | GBX |
340936 | Dec 1930 | GBX |
359054 | Oct 1931 | GBX |
384857 | Dec 1932 | GBX |
701589 | Dec 1953 | GBX |
714842 | Sep 1954 | GBX |
1586676 | Mar 1981 | GBX |
Entry |
---|
Soviet Inventions Illustrated, Week 8350, p. 13 SU 1001225, Feb. 1, 1984. |
Patent Abstracts of Japan, vol. 13, No. 496, p. 110, E 843, No. 1200548, Nov. 9, 1989. |