Number | Name | Date | Kind |
---|---|---|---|
3234421 | Reiling | Feb 1966 | |
3351798 | Bauer | Nov 1967 | |
3398312 | Edris et al. | Aug 1968 | |
3911308 | Akutsu et al. | Oct 1975 | |
3979624 | Lui et al. | Sep 1976 | |
4171498 | Fromm et al. | Oct 1979 |
Number | Date | Country |
---|---|---|
1463568 | Dec 1966 | FRX |
Entry |
---|
U.S. Patent Application Ser. No. 454,225, of P. D. Johnson, Filed Dec. 29, 1982, which is basis for English patent application 2133925A published Aug. 1, 1984. |