Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4364118 | Optical disk and optical information processor | Kazuo Shigematsu, Seiji Yonezawa | 1982-12-14 |
| 4352981 | Photoelectric focus and tracking apparatus | Toshio Sugiyama | 1982-10-05 |