Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9757597 | Safety-harness attachment | Johnnie E. Kotrla, Carter Erwin | 2017-09-12 |
| D748345 | Safety-harness attachment | Johnnie E. Kotrla, Carter Erwin | 2016-01-26 |
| 4433859 | Wellhead connector with release mechanism | Richard J. Herman | 1984-02-28 |