Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4726204 | Key-less combination cylinder lock, and a combination-changing tool | — | 1988-02-23 |
| 4375159 | Changeable combination tumbler wheel type key lock | Charles G. Bechtiger | 1983-03-01 |