Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883723 | Hot dip aluminum coated chromium alloy steel | Richard A. Coleman, Frank C. Dunbar, Alan F. Gibson | 1989-11-28 |
| 4800135 | Hot dip aluminum coated chromium alloy steel | Richard A. Coleman, Frank C. Dunbar, Alan F. Gibson | 1989-01-24 |
| 4797329 | Oxidation resistant ferrous base foil | F. Curtiss Dunbar | 1989-01-10 |