Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4337151 | Method and apparatus for pulsed timed control for sludge return line | — | 1982-06-29 |
| 4317723 | Sewage treatment | Walter Rapp | 1982-03-02 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4337151 | Method and apparatus for pulsed timed control for sludge return line | — | 1982-06-29 |
| 4317723 | Sewage treatment | Walter Rapp | 1982-03-02 |