Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871449 | Clarifier and screw compactor liquid-solid separator | — | 1989-10-03 |
| 4871454 | Portable dumpster slurry separating system | — | 1989-10-03 |
| 4818398 | Filter system with readily replaceable filter element | Glen Grant | 1989-04-04 |