| Number | Name | Date | Kind |
|---|---|---|---|
| 1334540 | Jones | Mar 1920 | |
| 2584908 | Oblinger | Feb 1952 | |
| 2891472 | Holzer | Jun 1959 | |
| 3020838 | Prost | Feb 1962 | |
| 3090304 | Sulkie | May 1963 | |
| 4392425 | Capezzuto et al. | Jul 1983 | |
| 4854235 | Lyon | Aug 1989 | |
| 5191837 | Bolton | Mar 1993 | |
| 5313885 | Winston | May 1994 | |
| 5579692 | Collier | Dec 1996 |
| Entry |
|---|
| Clear Snap--Stamp Products Resource Book 1994-1995 Anacortes, WA 98221. |