Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4732022 | Key for an improved twisting tumbler cylinder lock | — | 1988-03-22 |
| 4723427 | Symmetrical side bar lock and key therefor | — | 1988-02-09 |
| 4635455 | Cylinder lock | — | 1987-01-13 |
| 4530223 | Guard for key cylinder | — | 1985-07-23 |
| RE31910 | Removable core cylinder lock | — | 1985-06-11 |
| 4328690 | Removable core cylinder lock | — | 1982-05-11 |
| RE30243 | Padlock closure | — | 1980-04-01 |
| RE30198 | Cylinder lock | Elvis C. Flora, Paul Anthony Powell, Roy C. Spain | 1980-01-29 |