Number | Date | Country | Kind |
---|---|---|---|
3501761 | Jan 1985 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
1228888 | Dreymann | Jun 1917 | |
1701703 | Starrels | Feb 1929 | |
2360844 | Bradshaw et al. | Oct 1944 | |
2494366 | Sproles et al. | Jan 1950 | |
2678332 | Cottle | May 1954 | |
3037052 | Bortnick | May 1962 | |
4164506 | Kawahara et al. | Aug 1979 | |
4608202 | Lepper et al. | Aug 1986 |
Entry |
---|
Sussman, I. & E. C., vol. 78, No. 12, pp. 1228-1230, Dec. 1946,. |