Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846261 | Vacuum heat exchange apparatus for ventilation of buildings, in particularly of animal sheds | — | 1989-07-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4846261 | Vacuum heat exchange apparatus for ventilation of buildings, in particularly of animal sheds | — | 1989-07-11 |