Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4199856 | Method of providing lubricant volume displacement system for a rotary rock bit | James T. Farrow, William D. Vanderford | 1980-04-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4199856 | Method of providing lubricant volume displacement system for a rotary rock bit | James T. Farrow, William D. Vanderford | 1980-04-29 |