Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6098197 | Leather firefighter helmet and method for making a leather firefighting helmet | John M. Hetzel, Jr. | 2000-08-08 |
| 5940891 | Goggle mounting system with removable eyelet | — | 1999-08-24 |
| 5555569 | Helmet and face mask interface system | — | 1996-09-17 |
| 5121508 | Firefighter's helmet having head securing means | William L. Grilliot, Mary I. Grilliot | 1992-06-16 |
| 5113534 | Firefighter's helmet having tilt adjustment | John M. Hetzel, Jr. | 1992-05-19 |
| 5018220 | Firefighter's helmet | John M. Hetzel, Jr. | 1991-05-28 |
| 4766609 | Fire fighter helmet and face shield | — | 1988-08-30 |