Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7296568 | Respirator module with speech transmission and exhalation valve | Tim John Maclean | 2007-11-20 |
| 7213595 | Multi-stage respirator filter with TIM filter option | David K. Friday, David W. Pike | 2007-05-08 |
| 6860267 | Self-sealing filter connection and gas mask filter assembly incorporating the same | David K. Friday, Brian E. Davis, David W. Pike, Gary M. Dunn | 2005-03-01 |