Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4556491 | Avoidance of rising sludge in biological wastewater treatment clarifiers | Marshall L. Spector, Sun-Nan Hong | 1985-12-03 |
| 4526821 | Multi-layer container and method of making same | Robert J. McHenry | 1985-07-02 |