Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4577700 | Method and system for displacing drilling fluid from a drill string in a well drilling system | Thomas B. Dellinger, William G. Boston, James H. Sexton | 1986-03-25 | $5,520,000 |
| 4539102 | Method and apparatus for separating artificial drill cuttings from natural drill cuttings | William G. Boston | 1985-09-03 | $10,582,000 |