Number | Date | Country | Kind |
---|---|---|---|
8318109 | Jul 1983 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
3782856 | Salkind et al. | Jan 1974 | |
4248572 | Fradenburgh | Feb 1981 |
Number | Date | Country |
---|---|---|
36825 | Sep 1981 | EPX |
37633 | Oct 1981 | EPX |
421916 | Mar 1911 | FRX |
859557 | Dec 1940 | FRX |
Entry |
---|
U.S. Ser. No. 318,662 filed 6-1943, Bitterli et al. |