Issued Patents All Time
Showing 226–249 of 249 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839251 | Photo-mask for use in manufacturing an optical memory disc, a method for making the photo-mask and a method for manufacturing the optical memory disc | Akira Takahashi, Tetsuya Inui, Junji Hirokane, Hiroyuki Katayama | 1989-06-13 |
| 4818648 | Optical memory element | Akira Takahashi, Tetsuya Inui, Hiroyuki Katayama, Junji Hirokane, Yoshiteru Murakami | 1989-04-04 |
| 4792474 | Optical memory element | Yoshiteru Murakami, Akira Takahashi, Yoshikazu Fujii, Hiroyuki Katayama | 1988-12-20 |
| 4787076 | Optical disc tracking system with switching of tracking error signals at boundary between track guide and track address | Toshihisa Deguchi, Tetsuya Inui, Shohichi Katoh | 1988-11-22 |
| 4786559 | Magnetooptical storage element | Yoshiteru Murakami, Akira Takahashi, Hiroyuki Katayama, Tomoyuki Miyake, Michinobu Mieda | 1988-11-22 |
| 4778747 | Method of manufacturing optical memory element | Akira Takahashi, Tetsuya Inui, Junji Hirokane, Toshihisa Deguchi | 1988-10-18 |
| 4764441 | Photo-mask for production of substrate for optical memory element | Junji Hirokane, Tetsuya Inui, Akira Takahashi, Hiroyuki Katayama | 1988-08-16 |
| 4754355 | Optical head | Akira Takahashi, Toshihisa Deguchi, Yoshiteru Murakami, Michinobu Mieda, Kazuo Van | 1988-06-28 |
| 4740947 | Dual surface optical memory disc | Akira Takahashi, Hiroyuki Katayama, Junji Hirogane, Yoshiteru Murakami | 1988-04-26 |
| 4719137 | Magneto-optic memory element | Akira Takahashi, Hiroyuki Katayama, Junji Hirogane, Yoshiteru Murakami | 1988-01-12 |
| 4717628 | Magnetooptical storage element | Akira Takahashi, Yoshiteru Murakami, Hiroyuki Katayama, Junji Hirokane | 1988-01-05 |
| 4695514 | Magneto-optical memory element | Akira Takahashi, Yoshiteru Murakami, Junji Hirokane, Hiroyuki Katayama | 1987-09-22 |
| 4677601 | Method of forming permanent memory locations in a magnetooptic memory medium | Toshihisa Deguchi, Akira Takahashi | 1987-06-30 |
| 4658393 | Optical memory disc | Akira Takahashi, Tetsuya Inui, Takao Hyuga, Hideyoshi Yamaoka | 1987-04-14 |
| 4634617 | Optical memory disc | Akira Takahashi, Tetsuya Inui, Takao Hyuga, Hideyoshi Yamaoka | 1987-01-06 |
| 4610912 | Magneto-optic memory element | Akira Takahashi, Yoshiteru Murakami, Junji Hirokane, Hiroyuki Katayama, Hideyoshi Yamaoka | 1986-09-09 |
| 4573149 | Magneto-optical head assembly with improved detection means | Toshihisa Deguchi, Akira Takahashi, Hideyoshi Yamaoka | 1986-02-25 |
| 4544443 | Method for manufacturing an optical memory element | Junji Hirokane, Hiroyuki Katayama, Akira Takahashi, Hideyoshi Yamaoka | 1985-10-01 |
| 4497006 | Magneto-optic recording/playback head assembly | Toshihisa Deguchi, Akira Takahashi | 1985-01-29 |
| 4489139 | Magneto-optic memory medium | Akira Takahashi | 1984-12-18 |
| 4467383 | Magnetooptic memory medium | Toshihisa Deguchi, Akira Takahashi | 1984-08-21 |
| 4414650 | Magneto-optic memory element | Akira Takahashi, Toshihisa Deguchi | 1983-11-08 |
| 4400844 | Wiper device | Nobuo Hayakawa, Yasuo Ohashi, Yasumasa Takagi, Masami Gotoh | 1983-08-30 |
| 4390600 | Magneto-optic memory medium | Akira Takahashi | 1983-06-28 |