Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5291881 | Air cleaning cartridge for a gas mask and breathing equipment with an insert | Wolfgang Drews, Stephan Melzer, Hasso Weinmann | 1994-03-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5291881 | Air cleaning cartridge for a gas mask and breathing equipment with an insert | Wolfgang Drews, Stephan Melzer, Hasso Weinmann | 1994-03-08 |