Issued Patents 2022
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11230906 | Locking backpressure valve | Larry T. Palmer, Erik Van Steveninck | 2022-01-25 |
| 11215030 | Locking backpressure valve with shiftable valve seat | Larry T. Palmer, Erik Van Steveninck | 2022-01-04 |
| 11215031 | Locking backpressure valve with shiftable valve sleeve | Larry T. Palmer, Erik Van Steveninck | 2022-01-04 |