Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4944887 | Regenerative diatomaceous earth filter | — | 1990-07-31 |
| 4705629 | Modular operations center for in-ground swimming pool | Donald H. Weir, Robert A. Hotaling, Ronald B. Robol | 1987-11-10 |
| 4661247 | Modular operations center for in-ground swimming pool | Donald H. Weir, Robert A. Hotaling, Ronald B. Robol | 1987-04-28 |
| 4545906 | Swimming pool filtering system | — | 1985-10-08 |
| 4421643 | Swimming pool filtering system | — | 1983-12-20 |
| 4330412 | Hydrotherapy device, method and apparatus | — | 1982-05-18 |