Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877532 | Centrifugal oxygenator and method for treatment of waste water | Thomas E. Stirling | 1989-10-31 |
| 4854828 | Remotely removable and replaceable motor for hazardous service pump installation | — | 1989-08-08 |