Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6736137 | Protective hooded respirator with oral-nasal cup breathing interface | Todd A. Resnick, Richard L. Stein, John J. Kern | 2004-05-18 |
| 6248280 | Method of manufacturing a respirator cartridge seal | John J. Kern | 2001-06-19 |
| 6099293 | Apparatus for manufacturing a respirator cartridge seal | John J. Kern | 2000-08-08 |