Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6913685 | Method of modifying the surface of plastic substrate | Masao Kawaguchi, Yoshio Hirayama | 2005-07-05 |
| 6531047 | Surface modification method for an aluminum substrate | Takamitsu Kato, Mitsugi Maekawa, Yuichi Hyakusoku, Masaaki Kato | 2003-03-11 |
| 6461445 | Method of finishing glass substrate | Yoshio Hirayama, Masao Kawaguchi, Toshimichi Morizane | 2002-10-08 |
| 6048466 | Method of cleaning glass substrate for magnetic disk or semiconductor substrate | Toshinori Morizane, Masao Kawaguchi | 2000-04-11 |
| 6002196 | Piezoelectric dispersion type organic damping composite | Masao Sumita | 1999-12-14 |
| 5273836 | Magnetooptic recording material | Toshitaka Fujii, Naoshi Horiai, Michihiko Kubota | 1993-12-28 |
| 5209837 | Process for preparing magnetic disk | Noboru Tsuya, Toshiro Takahashi | 1993-05-11 |
| 5108812 | Substrate for a magnetic disk and process for its production | Toshiro Takahashi, Noboru Tsuya | 1992-04-28 |
| 5074971 | Process for preparing magnetic disk | Noboru Tsuya, Toshiro Takahashi | 1991-12-24 |
| 5047274 | Annodized aluminum substrate for a magnetic recording disk in which pores are filled with a non magnetic material and the surface polished and etched | Noboru Tsuya, Toshiro Takahashi | 1991-09-10 |
| 4985306 | Base plate for recording disc and a method for its manufacture | Toshinori Morizane | 1991-01-15 |
| 4925738 | Substrate for a magnetic disk and process for its production | Noboru Tsuya, Toshiro Takahashi | 1990-05-15 |
| 4911987 | Metal/ceramic or ceramic/ceramic bonded structure | Kimiko Sakata | 1990-03-27 |
| 4904349 | Methods for producing optomagnetic recording media and systems for their use | Makoto Shiraki | 1990-02-27 |
| 4895762 | Magnetic recording material | Makoto Shiraki, Yoshifumi Suzuki, Yukio Wakui | 1990-01-23 |
| 4803129 | Magnetic recording material | Naoshi Noriai | 1989-02-07 |
| 4761330 | Optomagnetic recording medium | Makato Shiraki | 1988-08-02 |
| 4681669 | Method for producing magnetic recording media | Toshiro Takahashi, Yoshifumi Suzuki, Yukio Wakui | 1987-07-21 |
| 4463649 | Waveform producing system employing scanning of a waveform pattern | — | 1984-08-07 |