Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4481802 | Method of peening the inside of a small diameter tube | Douglas G. Harman | 1984-11-13 |
| 4290303 | Apparatus for measuring surface scratches on a tube | Douglas G. Harman, George W. Gruber | 1981-09-22 |