Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5350281 | Fan with secondary air passage for motor cooling | — | 1994-09-27 |
| 4878805 | Blower for use in particle contaminated environments | — | 1989-11-07 |
| 4491374 | Screw pump lubrication system | Donald W. Butler, Anson Stark Coolidge | 1985-01-01 |