Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9970569 | Closure member position indicator system for use in a blowout preventer | Johnnie E. Kotrla | 2018-05-15 |
| 9757597 | Safety-harness attachment | Johnnie E. Kotrla, Gary R. Driver | 2017-09-12 |
| D748345 | Safety-harness attachment | Johnnie E. Kotrla, Gary R. Driver | 2016-01-26 |