Issued Patents All Time
Showing 51–60 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6217305 | Screw pumps | Michael Henry North | 2001-04-17 |
| 6200116 | Vacuum pumps | Michael Henry North | 2001-03-13 |
| 6129534 | Vacuum pumps | Michael Henry North | 2000-10-10 |
| 6109864 | Vacuum pumps | Ian David Stones | 2000-08-29 |
| 5848873 | Vacuum pumps | — | 1998-12-15 |
| 5772395 | Vacuum pumps | — | 1998-06-30 |
| 5626469 | Scroll apparatus | — | 1997-05-06 |
| 5611660 | Compound vacuum pumps | David C. Wong | 1997-03-18 |
| 5354172 | Molecular drag vacuum pump | — | 1994-10-11 |
| 5344282 | Molecular drag type vacuum pump | — | 1994-09-06 |