Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4789313 | Apparatus for and method of pumping output fluids such as abrasive liquids | Timothy M. Tower, Paul D. Harold | 1988-12-06 |
| 4691790 | Method and apparatus for removing the inner conduit from a dual passage drill string | Michael C. McDonald, T. B. O'Brien | 1987-09-08 |
| 4534425 | Cable reaming apparatus and method | Thomas A. O'Hanlon, Thomas J. Kendrew | 1985-08-13 |
| 4498813 | Underground cable installing apparatus and method utilizing a fluid jet assisted, vibrating blade arrangement | Terry L. Nelson | 1985-02-12 |
| 4493379 | Cable reaming apparatus and method | Thomas A. O'Hanlon, Thomas J. Kendrew | 1985-01-15 |
| 4403667 | Cable following apparatus utilizing a releasable cable gripping mechanism | — | 1983-09-13 |
| 4396073 | Underground boring apparatus with controlled steering capabilities | Douglas P. Kelley | 1983-08-02 |
| 4385667 | Cable reaming apparatus | Thomas A. O'Hanlon, Thomas J. Kendrew | 1983-05-31 |