Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5195879 | Improved method for injecting treatment chemicals using a constant flow positive displacement pumping apparatus | D. Dwaine Reese, Roy D. Sawyer | 1993-03-23 |
| 5066199 | Method for injecting treatment chemicals using a constant flow positive displacement pumping apparatus | D. Dwaine Reese, Roy D. Sawyer | 1991-11-19 |
| 4855668 | Flexible probe and sampling device for corrosion measuring | — | 1989-08-08 |