Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6925655 | Protective helmet with selectively covered aperture | Richard R. Maki, Joshua J. Leonard | 2005-08-09 |
| 6904616 | Positive pressure protective helmet | Richard R. Maki, Joshua J. Leonard | 2005-06-14 |
| 6766537 | Protective helmet with detachable shell piece | Richard R. Maki, Joshua J. Leonard | 2004-07-27 |