Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11143338 | Composite to metal end fitting joint | James C. Leslie, James Heard, Marvin Josephson, Hans Neubert | 2021-10-12 |
| 11009156 | Composite drill pipe | James C. Leslie, James Heard, Marvin Josephson | 2021-05-18 |