Number | Date | Country | Kind |
---|---|---|---|
URA 1466/82 | Dec 1982 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
D151692 | Heller | Nov 1948 | |
D165414 | Crosby et al. | Dec 1951 | |
D184265 | Ruskin | Jan 1959 | |
2309628 | Crosby | Feb 1943 | |
2456526 | Morberg | Dec 1948 | |
2936456 | Ruskin | May 1960 |