| Number | Name | Date | Kind |
|---|---|---|---|
| D208815 | Hubbard | Oct 1967 | |
| 229348 | Witter | Jun 1880 | |
| D308471 | Murai | Jun 1990 | |
| 4577374 | Lii | Mar 1986 | |
| 4868954 | Kasai | Sep 1989 | |
| 5002420 | Loyd | Mar 1991 |
| Entry |
|---|
| Wilcox-Crittendon, Dec. 12, 1987, p. 52, spring snap, located at bottom of page. |
| Wilcox-Crittendon, Dec. 12, 1987, p. 67, Swivel Eye Safety Snap Clamp, item A, located at left bottom of page. |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 690815 | Apr 1991 |