Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5017241 | Backwash method and apparatus | — | 1991-05-21 |
| 4405466 | Backwash method and apparatus | Joseph F. Giannelli, George C. Flynn | 1983-09-20 |
| 4267039 | Fluid filtration method and apparatus | — | 1981-05-12 |
| 4210537 | Liquid treatment apparatus | Donald J. Butterworth | 1980-07-01 |