Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5322119 | Submersible well probe sleeve | Michael A. Yusella, Robert J. Clark | 1994-06-21 |
| 5147559 | Controlling cone of depression in a well by microprocessor control of modulating valve | Robert W. Brophey | 1992-09-15 |
| 5028212 | Method and apparatus for removal of floating immiscible liquids | Robert W. Brophey | 1991-07-02 |