Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5622205 | Check valve having reserved mechanical closure | — | 1997-04-22 |
| 4637425 | Sewer check valve with cutting seat | — | 1987-01-20 |
| PP5570 | "Pear tree ""San Joaquin""" | — | 1985-10-08 |
| 4257628 | Pipe connector and hole cutter | — | 1981-03-24 |