Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871512 | Alloys for exhaust valve | Yoshiaki Takagi, Kenkichi Matsunaga | 1989-10-03 |
| 4849168 | Ti-Al intermetallics containing boron for enhanced ductility | Yukio Nishiyama, Takuya Miyashita, Toshiharu Noda | 1989-07-18 |