Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6790497 | Superhard material article of manufacture | John J. Prizzi, David R. Siddle | 2004-09-14 |
| 6684968 | Roof bit body and insert assembly | Douglas E. Bise, Phillip W. Haga | 2004-02-03 |