Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6183208 | Immersible motor system | Robert B. Ray | 2001-02-06 |
| 6079958 | Dry-pit submersible pump having a fan and a torque-relieving mechanism | — | 2000-06-27 |
| 6036434 | Aeration system | Robert B. Ray, Gary L. Olin | 2000-03-14 |
| 5591001 | Aeration system | Robert B. Ray, Gary L. Olin | 1997-01-07 |