| Number | Name | Date | Kind |
|---|---|---|---|
| D322745 | Olsen | Dec 1991 | |
| 2752773 | Abelson et al. | Jul 1956 | |
| 3097007 | Eichacker et al. | Jul 1963 | |
| 3765198 | Horgan, Jr. | Oct 1973 | |
| 3819213 | Vanderburch | Jun 1974 | |
| 4736974 | Rosenthal | Apr 1988 |
| Entry |
|---|
| "Handy Kap".TM., The Panic Bolt Guard, 4-page brochure. |