Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4327261 | Apparatus for sensing a distended location on a drill pipe | — | 1982-04-27 |
| 4202225 | Power tongs control arrangement | James R. Tomashek, Donald H. Ward | 1980-05-13 |
| 4187546 | Computer-controlled oil drilling rig having drawworks motor and brake control arrangement | James P. Heffernan, James R. Tomashek, Donald H. Ward | 1980-02-05 |