Number | Name | Date | Kind |
---|---|---|---|
3845389 | Phillips et al. | Oct 1974 | |
3906160 | Nakamura et al. | Sep 1975 | |
4077007 | McKinney | Feb 1978 | |
4130803 | Thompson | Dec 1978 | |
4312076 | Gamm | Jan 1982 | |
4321433 | King | Mar 1982 | |
4451935 | Henschel | Jun 1984 | |
4524461 | Kostanty et al. | Jun 1985 | |
4727599 | Rappaport et al. | Feb 1988 | |
4776044 | Makins | Oct 1988 | |
4827384 | Von Schlemmer | May 1989 | |
4833726 | Shinoda et al. | May 1989 | |
4856086 | McCullough | Aug 1989 | |
4858248 | Goldsmith et al. | Aug 1989 | |
4869509 | Lee | Sep 1989 | |
4882769 | Gallimore | Nov 1989 | |
5034995 | Ciccone | Jul 1991 | |
5052054 | Birum | Oct 1991 |
Number | Date | Country |
---|---|---|
1384768 | Nov 1964 | FRX |
0288525 | Dec 1986 | JPX |
1593061 | Jul 1981 | GBX |
Entry |
---|
Schwartz Radio Hat, Potomac Magazine, Washington Post, Dec. 10, 1972, p. 71. |