Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6332462 | Method and device for producing respiratory air which is harmless to health in positive pressure nasal breathing apparatus | — | 2001-12-25 |
| 4988418 | Method of electrically measuring the concentration of acids | Fritz Beck, Rainer Wagner, Eberhard Nann | 1991-01-29 |