Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6038898 | Internally bitted key changeable, axial pin tumbler lock and compatible key | — | 2000-03-21 |
| 5979200 | Axial pin tumbler removable core lock | — | 1999-11-09 |
| 5678438 | Cabinet lock construction convertible between a drawer lock and a doorlock | Donald J. Kolkman | 1997-10-21 |