Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5989654 | Method for manufacturing an optical information recording medium | Eiji Ohno, Hidemi Isomura, Hiroyuki Ohta | 1999-11-23 |
| RE36383 | Optical recording medium and production process for the medium | Takeo Ohta, Masami Uchida, Katsumi Kawahara, Shigeaki Furukawa | 1999-11-09 |
| 5753334 | Optical recording medium | Takeo Ohta, Shigeaki Furukawa, Katsumi Kawahara | 1998-05-19 |
| 5674649 | Method of recording information | Tetsuya Akiyama, Takeo Ohta, Hidemi Isomura | 1997-10-07 |
| 5665520 | Optical recording medium | Tetsuya Akiyama, Takeo Ohta, Hidemi Isomura | 1997-09-09 |
| 5587216 | Optical recording medium | Takeo Ohta, Shigeaki Furukawa, Katsumi Kawahara | 1996-12-24 |
| 5439752 | Optical recording medium and reflecting film for use therein | Takeo Ohta, Masami Uchida, Shigeaki Furukawa | 1995-08-08 |
| 5230973 | Method of recording and erasing information in an erasible optical recording medium | Takeo Ohta, Masami Uchida, Katsumi Kawahara, Shigeaki Furukawa | 1993-07-27 |
| 5194363 | Optical recording medium and production process for the medium | Takeo Ohta, Masami Uchida, Katsumi Kawahara, Shigeaki Furukawa | 1993-03-16 |
| 5191565 | Optical information recording medium | Kazuo Inoue, Takeo Ohta, Masami Uchida, Shigeaki Furukawa | 1993-03-02 |
| 5151295 | Process for manufacturing an optical recording medium | Katsumi Kawahara, Masami Uchida, Takeo Ohta, Keiichiro Horai | 1992-09-29 |