Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889170 | High strength Ti alloy material having improved workability and process for producing the same | Tsutomu Oka, Atsushi Hirano | 1989-12-26 |
| 4808243 | High damping zinc alloy with good intergranular corrosion resistance and high strength at both room and elevated temperatures | Akihiko Sakonooka | 1989-02-28 |