Number | Name | Date | Kind |
---|---|---|---|
D46745 | Kyle | Dec 1914 | |
D252758 | Prall | Aug 1979 | |
D302986 | Takai et al. | Aug 1989 | |
D303187 | Mickelsen | Sep 1989 | |
D380232 | Egan et al. | Jun 1997 | |
589180 | Lamb | Aug 1897 | |
2485517 | Vaule et al. | Oct 1949 | |
2671566 | Levy, Jr. | Mar 1954 | |
2808308 | Papelian et al. | Oct 1957 | |
2833550 | Frick | May 1958 | |
2981030 | Knop | Apr 1961 | |
3107442 | Levine | Oct 1963 | |
3468039 | Dubbert | Sep 1969 | |
4098009 | Flynn | Jul 1978 | |
4123127 | Ford | Oct 1978 | |
4457717 | Chika | Jul 1984 | |
4667254 | Araki et al. | May 1987 | |
5104085 | Brice | Apr 1992 | |
5200853 | Berkman | Apr 1993 | |
5273248 | Grander | Dec 1993 | |
5397091 | Tsuar | Mar 1995 | |
5492476 | Ball et al. | Feb 1996 | |
5511348 | Cornell et al. | Apr 1996 | |
5725380 | Kennelly | Mar 1998 |
Number | Date | Country |
---|---|---|
165217 | Jul 1949 | DEX |
Entry |
---|
Magnetic Visual Control Systems catalog, p. 47, Apr. 6, 1982. |