| Number | Name | Date | Kind |
|---|---|---|---|
| D279611 | Peeler et al. | Jul 1985 | |
| 2545659 | Ginter | Mar 1951 | |
| 2798938 | Jewell | Jul 1957 | |
| 4280167 | Ellett | Jul 1981 | |
| 4316237 | Yamada et al. | Feb 1982 |
| Number | Date | Country |
|---|---|---|
| 2229815 | Jan 1974 | DEX |
| 7409286 | Jan 1975 | NLX |
| Entry |
|---|
| Modern Plastics, Encyclopedia, 9-1959-1960, p. 771, Handle. |