Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11352838 | Low friction and high wear resistant sucker rod string | Fritz C. Grensing, Diane M. Nielsen, William D. Nielsen, Christopher W. Damschroder | 2022-06-07 |
| 10844671 | Low friction and high wear resistant sucker rod string | Fritz C. Grensing, Diane M. Nielsen, William D. Nielsen, Christopher W. Damschroder | 2020-11-24 |
| D459538 | Light cord hanging hook | Mark Anthony Pacheco | 2002-06-25 |
| 4987762 | Individually variable multi-station drawing apparatus | — | 1991-01-29 |