Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5842531 | Rotary rock bit with infiltrated bearings | — | 1998-12-01 |
| 5794726 | Rotary rock bit with infiltrated bearings | — | 1998-08-18 |
| 5661697 | Method and apparatus for detection of sand formations in amplitude-versus-offset seismic surveys | Herbert W. Swan, James Specht | 1997-08-26 |
| 4402617 | Thin wall sintered bushing for a rock bit | — | 1983-09-06 |