Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11174688 | Sucker rod guides | Fritz C. Grensing, Christopher W. Damschroder, Michael J. Gedeon, William D. Nielsen | 2021-11-16 |
| 11008818 | Coupling for rods | William D. Nielsen, Fritz C. Grensing | 2021-05-18 |