| Number | Name | Date | Kind |
|---|---|---|---|
| 3820805 | Tuomala | Jun 1974 | |
| 4067347 | Lipinski | Jan 1978 | |
| 4794717 | Horsmann | Jan 1989 | |
| 5033493 | Senchuck | Jul 1991 | |
| 5343887 | Danaher | Sep 1994 | |
| 5368057 | Lubkeman et al. | Nov 1994 | |
| 5458079 | Mattews et al. | Oct 1995 |
| Entry |
|---|
| Article entitled "Tactics & Gear", Ducks Unlimited, p. 60. |