Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5332048 | Method and apparatus for automatic closed loop drilling system | Harold D. Johnson, Charles H. Dewey | 1994-07-26 |
| 5318137 | Method and apparatus for adjusting the position of stabilizer blades | Harold D. Johnson, Charles H. Dewey | 1994-06-07 |
| 5318138 | Adjustable stabilizer | Charles H. Dewey, Harold D. Johnson | 1994-06-07 |