Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6994916 | Friction stir grain refinement of structural members | Douglas J. Waldron | 2006-02-07 |
| 6484924 | Method and apparatus for backing up a friction stir weld joint | — | 2002-11-26 |
| 6398883 | Friction stir grain refinement of structural members | Douglas J. Waldron | 2002-06-04 |