Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836307 | Hard facing for milled tooth rock bits | Lance D. Underwood, Naresh J. Kar, Thomas W. Oldham, Cary A. Roth, Brian J. Armstrong | 1989-06-06 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4836307 | Hard facing for milled tooth rock bits | Lance D. Underwood, Naresh J. Kar, Thomas W. Oldham, Cary A. Roth, Brian J. Armstrong | 1989-06-06 |