Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888491 | Device for measuring angular deviation of flat plate | Masaki Kobayashi | 1989-12-19 |
| 4837130 | Optical disk manufacturing method | Kenji Suzuki, Satoru Fukuoka, Toshihiko Takishita, Tuyoshi Hayashi | 1989-06-06 |