Issued Patents 1989
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879703 | Magneto-optic memory apparatus with defect detection of recording medium during erasing operation | Toshimitsu Kaku, Kazuo Shigematsu | 1989-11-07 |
| 4855991 | Optical disk having track offset detection areas | Toshimitsu Kaku, Takeshi Maeda, Shigeru Nakamura | 1989-08-08 |
| 4835756 | Optical memory apparatus using an optical disc having guide-grooves of V-shape and predetermined optical depth and access method therefor | Toshimitsu Kaku, Takeshi Maeda, Shigeru Nakamura, Masaru Ito, Kazuo Shigematsu | 1989-05-30 |
| 4815058 | Optical information processing apparatus | Shigeru Nakamura | 1989-03-21 |
| 4807210 | Optical information processing apparatus | Toshimitsu Kaku, Kazuo Shigematsu, Takeshi Maeda | 1989-02-21 |
| 4802153 | Optical information processor and method for accessing rotating record carrier utilizing acousto-optic light deflector including holding a focus error signal during track jumping | Keiji Kataoka, Takeshi Maeda | 1989-01-31 |