Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4317453 | Method and apparatus for testing a person's breath for the determination of its alcohol content | Ulrich Heim | 1982-03-02 |
| 4248245 | Method and device for determining and separating the alveolar air proportion from the breathing air | — | 1981-02-03 |