Issued Patents All Time
Showing 1–25 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5344730 | Method of recording information on a photographic film | — | 1994-09-06 |
| 4982302 | Magnetic recording medium and method for magnetic recording and reproduction | Koji Sasazawa, Hotaka Minaguchi, Hiromichi Shibaya | 1991-01-01 |
| 4876022 | Method for preparing ferromagnetic iron oxide particles | Nobuo Yamazaki | 1989-10-24 |
| 4875610 | Method of and system for driving magnetic tape | Katsuya Yokoyama, Takuji Sekiguchi | 1989-10-24 |
| 4713261 | Method for preparing ferromagnetic iron oxide particles | Kouichi Masaki | 1987-12-15 |
| 4700198 | Process for recording information by irradiation of, an deposition on, a substrate | Ryuji Shirahata, Yoshihiro Arai | 1987-10-13 |
| 4678682 | Process for producing magnetic recording medium | Takamitsu Asai, Goro Akashi, Hiroshi Chikamasa, Tsunehiko Sato | 1987-07-07 |
| 4666773 | Magnetic recording medium | Goro Akashi | 1987-05-19 |
| 4626315 | Process of forming ultrafine pattern | Hiroshi Amari, Akira Nahara, Ryuji Shirahata, Yoshihiro Arai | 1986-12-02 |
| 4610903 | Magneto-optical disk memory | Masaaki Nomura, Akira Nahara | 1986-09-09 |
| 4608093 | Ferromagnetic particles with stable magnetic characteristics and method of preparing same | Shizuo Umemura | 1986-08-26 |
| 4588636 | Magnetic recording medium | Ryuji Shirahata, Akio Yanai | 1986-05-13 |
| 4588656 | Method of preparing a magnetic recording medium | Ryuji Shirahata, Yasuyuki Yamada, Goro Akashi | 1986-05-13 |
| 4582746 | Magnetic recording medium | Ryuji Shirahata | 1986-04-15 |
| 4581251 | Process for producing cobalt-modified ferromagnetic iron oxide | Shin-ichiro Dezawa, Hideaki Kosha | 1986-04-08 |
| 4576635 | Process for producing ferromagnetic metal powder | Hiroaki Araki | 1986-03-18 |
| 4554089 | Ferromagnetic particles with stable magnetic characteristics and method of preparing same | Shizuo Umemura | 1985-11-19 |
| 4547393 | Method for preparing a magnetic recording medium | Takamitsu Asai, Goro Akashi | 1985-10-15 |
| 4520069 | Magnetic recording medium | Goro Akashi | 1985-05-28 |
| 4515857 | Magnetic recording medium | Goro Akashi | 1985-05-07 |
| 4513054 | Magnetic recording medium | Goro Akashi | 1985-04-23 |
| 4503119 | Magnetic recording media | Ryuji Shirahata, Yasuyuki Yamada, Goro Akashi | 1985-03-05 |
| 4487627 | Method for preparing ferromagnetic metal particles | Shizuo Umemura | 1984-12-11 |
| 4486496 | Magnetic recording medium | Shin-ichiro Dezawa, Goro Akashi | 1984-12-04 |
| 4482578 | Method for preparing magnetic recording media | Goro Akashi, Tsutomu Okita | 1984-11-13 |