Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5720280 | Attenuator for use with respirators | Gerald V. Elstran, Robert J. Mattila | 1998-02-24 | $19,349,000 |
| 5592935 | Positive/negative air pressure adaptor for use with respirators | Gerald V. Elstran, Robert J. Mattila | 1997-01-14 | $12,261,000 |