Issued Patents 2021
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11174688 | Sucker rod guides | Christopher W. Damschroder, Michael J. Gedeon, Diane M. Nielsen, William D. Nielsen | 2021-11-16 |
| 11008645 | Wear-resistant Cu—Ni—Sn coating | Robert E. Kusner, David J. Krus, William D. Nielsen, Karl R. Ziegler | 2021-05-18 |
| 11008818 | Coupling for rods | William D. Nielsen, Diane M. Nielsen | 2021-05-18 |
| 10984931 | Magnetic copper alloys | W. Raymond Cribb, Amy E. Craft, Derrick Brown | 2021-04-20 |