Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5865999 | Nozzleless underdrain for granular filtration system | Edward Shea, Kathleen R. Gammell | 1999-02-02 |
| 5332497 | Nozzleless underdrain for granular filtration system | Edward Shea | 1994-07-26 |