Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5222488 | Respirator air filter cartridge with a replaceable filter element | — | 1993-06-29 |
| 5063926 | Respirator cartridge with sealant dispersion member | Henry J. Drasner, III, Roy E. Fielder | 1991-11-12 |