Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830820 | Method for producing material for semiconductor device | Yoshiaki Itoh, Kiyoaki Akechi, Nobuhito Kuroishi | 1989-05-16 |
| 4818308 | Aluminum alloy and method for producing the same | Kiyoaki Akechi, Nobuhito Kuroishi | 1989-04-04 |