Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5738765 | Magneto-optic memory device | Kenji Ohta, Akira Takahashi, Hiroyuki Katayama, Junji Hirokane | 1998-04-14 |
| 5714251 | Magneto-optic memory device | Kenji Ohta, Akira Takahashi, Hiroyuki Katayama, Junji Hirokane | 1998-02-03 |
| 5331623 | Optical retrieval system for encoding pit angular data and optical recording element therefor | Hirotsugu Matoba, Toshihisa Deguchi, Shigeo Terashima | 1994-07-19 |
| 5214636 | Optical recording element having a plurality of thin film filtering layers and optical recording element having an electrically conductive layer | Toshio Ishikawa, Hiroyuki Katayama, Kazuo Van, Tomoyuki Miyake, Junichiro Nakayama +1 more | 1993-05-25 |
| 5200941 | Optical retrieval system for encoding pit angular data and optical recording element thereof | Hirotsugu Matoba, Toshihisa Deguchi, Shigeo Terashima | 1993-04-06 |
| 5013494 | Process for preparing blazed holograms | Katsuhiro Kubo, Keiji Sakai, Yukio Kurata | 1991-05-07 |
| 4988165 | Object lens driving device | Mitsuo Ishii, Yukio Kurata | 1991-01-29 |
| 4739431 | Thin-film magnetic head | Syuhei Yasuda, Katubumi Koyanagi | 1988-04-19 |
| 4721368 | Optical system in a magneto-optical memory device | Toshihisa Deguchi, Tetsuya Inui, Yoshikazu Fujii | 1988-01-26 |
| 4660190 | Optical focus position control in optical disc apparatus | Yoshikazu Fujii, Toshihisa Deguchi, Tetsuya Inui | 1987-04-21 |
| 4658390 | Optical focus position control in an optical memory system | Yosikazu Fujii, Tetsuya Inui, Toshihisa Deguchi | 1987-04-14 |
| 4658393 | Optical memory disc | Kenji Ohta, Akira Takahashi, Tetsuya Inui, Takao Hyuga | 1987-04-14 |
| 4634617 | Optical memory disc | Kenji Ohta, Akira Takahashi, Tetsuya Inui, Takao Hyuga | 1987-01-06 |
| 4610912 | Magneto-optic memory element | Akira Takahashi, Yoshiteru Murakami, Junji Hirokane, Hiroyuki Katayama, Kenji Ohta | 1986-09-09 |
| 4573149 | Magneto-optical head assembly with improved detection means | Toshihisa Deguchi, Kenji Ohta, Akira Takahashi | 1986-02-25 |
| 4544443 | Method for manufacturing an optical memory element | Kenji Ohta, Junji Hirokane, Hiroyuki Katayama, Akira Takahashi | 1985-10-01 |