Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879082 | Method for molding plastic material into disk shaped sabstrate for an optical information record carrier | Junichiro Kudo | 1989-11-07 |
| 4808374 | Method for producing aluminum alloy castings and the resulting product | Yoji Awano, Junichi Takabatake | 1989-02-28 |