Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667370 | Screw vacuum pump having a decreasing pitch for the screw members | — | 1997-09-16 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5667370 | Screw vacuum pump having a decreasing pitch for the screw members | — | 1997-09-16 |