Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878548 | Nozzle retention system for a drill bit | Alfred Ostertag, Robert Iversen, Craig R. Hyland, Kenneth D. Enever | 1989-11-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878548 | Nozzle retention system for a drill bit | Alfred Ostertag, Robert Iversen, Craig R. Hyland, Kenneth D. Enever | 1989-11-07 |