Number | Name | Date | Kind |
---|---|---|---|
2626811 | Hohwart et al. | Jan 1953 | |
3134620 | Blaisdell | May 1964 | |
3777875 | Sobran | Dec 1973 | |
3909021 | Morawski et al. | Sep 1975 | |
3945486 | Cooper | Mar 1976 | |
4168073 | LaRue | Sep 1979 | |
4680246 | Aoki et al. | Jul 1987 | |
4770456 | Phillips et al. | Sep 1988 | |
4783108 | Fukuyama et al. | Nov 1988 | |
5282888 | Fukawa et al. | Feb 1994 | |
5449182 | Petralia | Sep 1995 |
Number | Date | Country |
---|---|---|
418539 | Dec 1910 | FRX |
P1586159.3 | Aug 1970 | DEX |
Entry |
---|
Soviet Inventions Illustrated; Section PQ; Week 84/07; issued 28 Mar. 1984; Class=P54; An=84-041311/07; Su 1009-636-A (Abstract). |