Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4977818 | Air flow control system | Charles O. Ehret | 1990-12-18 |
| 4968072 | Bolt lock | Charles O. Ehret | 1990-11-06 |
| 4928583 | Air flow control system | Charles O. Ehret | 1990-05-29 |
| 4898411 | Portable door lock | Dennis M. Ocello | 1990-02-06 |