Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887941 | Method and apparatus for starting series-coupled vacuum pumps | Jean-Marie Crinquette | 1989-12-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887941 | Method and apparatus for starting series-coupled vacuum pumps | Jean-Marie Crinquette | 1989-12-19 |