Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9890607 | Independent guide string hanger | David Joseph Hanlin | 2018-02-13 |
| 9051808 | Independent guide string hanger | David Joseph Hanlin | 2015-06-09 |
| 8544539 | Independent guide string hanger | David Joseph Hanlin | 2013-10-01 |