Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861548 | Seawater-corrosion-resistant non-magnetic steel materials | Haruo Shimada | 1989-08-29 |
| 4844865 | Seawater-corrosion-resistant non-magnetic steel materials | Haruo Shimada | 1989-07-04 |
| 4836981 | Concrete reinforcing steel bar or wire | Haruo Shimada | 1989-06-06 |