Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9062525 | Offshore heavy oil production | Johannes Christiaan Lanfermeijer, Michael A. Silverman, Michael Hillerman, Jimmy Pelham | 2015-06-23 |
| 4190117 | Support and positioner for rock drill | — | 1980-02-26 |