Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4526688 | Pressure filter with vibratory impactor | Henry Schmidt, Jr., James F. Zievers | 1985-07-02 |
| 4289630 | Filter cake removal method and apparatus | Henry Schmidt, Jr., James F. Zievers | 1981-09-15 |