Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5351770 | Ultra hard insert cutters for heel row rotary cone rock bit applications | Scott D. McDonough, Gary R. Portwood, Michael A. Siracki | 1994-10-04 |
| 5341890 | Ultra hard insert cutters for heel row rotary cone rock bit applications | Gary R. Portwood, Michael A. Siracki | 1994-08-30 |