Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853087 | Process and apparatus for producing a filter with multiple folds | Georg Schlor | 1989-08-01 |
| 4832018 | Filter case holder | — | 1989-05-23 |
| 4784813 | Process for producing a filter with multiple folds | Georg Schlor | 1988-11-15 |
| 4438966 | Lock for carrying cases of respirators | William Eckstein | 1984-03-27 |
| 4277443 | Air purifying cartridges for respirators | Carl-Ernst van der Smissen | 1981-07-07 |
| 4246229 | Starting device for a chemical oxygen generator | William S. McBride | 1981-01-20 |