Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4690372 | Automatic regulating valve of the air flow sucked out of a room through a mechanical ventilating installation | — | 1987-09-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4690372 | Automatic regulating valve of the air flow sucked out of a room through a mechanical ventilating installation | — | 1987-09-01 |