Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818489 | Device for sampling breath air at the workplace | Winfried Gonner, Gottfried Machata | 1989-04-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4818489 | Device for sampling breath air at the workplace | Winfried Gonner, Gottfried Machata | 1989-04-04 |