Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D294410 | Valve assembly for a respirator | — | 1988-02-23 |
| D288730 | Yoke for a respirator | — | 1987-03-10 |
| 4630604 | Valve assembly for a replaceable filter respirator | — | 1986-12-23 |
| 4603692 | Yoke for the harness of a respirator | — | 1986-08-05 |
| 4316290 | Ear muff accessory for safety hard hat | — | 1982-02-23 |
| 4271538 | Safety spectacles | John H. King | 1981-06-09 |