Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6158515 | Artificial lifting device for well fluids using a continous loop | Richard H. Greer, Herbert W. Markwardt, Stephen B. Markwardt, John R. Watson | 2000-12-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6158515 | Artificial lifting device for well fluids using a continous loop | Richard H. Greer, Herbert W. Markwardt, Stephen B. Markwardt, John R. Watson | 2000-12-12 |