Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE32914 | Key and retainer card combination | — | 1989-05-02 |
| 4651604 | Apparatus for and method of duplicative punched notching of the serration edges of key blanks | Michael Mueller, Thomas L. Drehobl | 1987-03-24 |
| 4637236 | Key and retainer card combination | — | 1987-01-20 |