Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5613488 | Chemical oxygen generator breathing device with the exhalation bag within the inhalation bag | Michael Schwichtenberg | 1997-03-25 |
| 5267558 | Chemical cartridge for respirators | Klaus Haertle, Karl-Heinz Kohricht, Michael Schwichtenberg, Stefan Zloczysti | 1993-12-07 |
| 5222479 | Oxygen self-rescuer apparatus | Lothar Brauer, Klaus-Dieter Dahrendorf, Klaus Haertle, Werner Mascher, Udo Mushold +4 more | 1993-06-29 |
| 5111536 | Eyeglasses protective against gases | — | 1992-05-12 |
| 5046198 | Gas goggles | — | 1991-09-10 |
| 4784286 | Closing device | Klaus-Dieter Dahrendorf | 1988-11-15 |