Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5499624 | Breathing mask with face-contact actuated overpressure generating switch | Edmund Kruger | 1996-03-19 |
| 5454369 | Breathing mask with fixed mask body | Rüdiger Müller, Manfred Gdulla | 1995-10-03 |
| 5411021 | Breathing mask with speaking device | Manfred Gdulla, Rüdiger Müller | 1995-05-02 |
| 5070872 | Metering device for a lung-demand valve | — | 1991-12-10 |