Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4803859 | Tumbler wheel structure for radiological detector resistant combination lock | Stephen Helesfai | 1989-02-14 |
| 4796446 | Radiological detection resistant combination lock | Stephen Helesfai | 1989-01-10 |
| 4776190 | Radiological detection resistant key changeable combination lock | Stephen Helesfai, John Bishop, Gregory C. Lainhart | 1988-10-11 |
| 4404823 | View limiting dial and ring structure for combination locks and the like | Walter R. Evans | 1983-09-20 |
| D268644 | Combination lock fence lever with eccentric roller nose | — | 1983-04-19 |
| D266395 | Combination lock fence lever for bank vaults, safe doors and the like | — | 1982-10-05 |
| 4348172 | Portable propane gas hand torch | — | 1982-09-07 |
| D264301 | Piezoelectrically ignited portable propane gas hand torch | — | 1982-05-11 |
| 4275576 | Combination lock for safe doors and the like | — | 1981-06-30 |
| 4241594 | Slide cover type changeable key plug padlock | Walter R. Evans | 1980-12-30 |