Issued Patents 1994
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5368452 | Double diaphragm pump having two-stage air valve actuator | Daniel J. Kvinge, Steven Plager, Richard D. Zarneke | 1994-11-29 |
| 5332048 | Method and apparatus for automatic closed loop drilling system | Lance D. Underwood, Charles H. Dewey | 1994-07-26 |
| 5318137 | Method and apparatus for adjusting the position of stabilizer blades | Charles H. Dewey, Lance D. Underwood | 1994-06-07 |
| 5318138 | Adjustable stabilizer | Charles H. Dewey, Lance D. Underwood | 1994-06-07 |
| D345138 | Air motor | Frederick A. Powers | 1994-03-15 |