Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5960736 | Vacuum level control system using variable frequency drive | David C. Ludington, Fangjiang Guo, Roger A. Pellerin | 1999-10-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5960736 | Vacuum level control system using variable frequency drive | David C. Ludington, Fangjiang Guo, Roger A. Pellerin | 1999-10-05 |