Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886019 | Engine breather assembly with oil drain back | Roy A. Harper, Jr. | 1989-12-12 |
| D304948 | Carburetor float bowl adapter for use in oilfield pumping equipment | Roy A. Harper, Jr. | 1989-12-05 |
| 4846134 | Apparatus and method for removing and burning hydrocarbon vapors using an internal combustion engine | Joseph W. Perry, Jonathan T. Uhl, David E. Potts | 1989-07-11 |