Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5993971 | Optical information record medium | Keiichi Nito, Tohru Nagai, Tsutomu Noguchi, Mayumi Miyashita, Katsumi Kohno | 1999-11-30 |
| 5153099 | Wavelength multiplexed optical recording material | Noriyuki Kishii, Shinichiro Tamura, Nobutoshi Asai, Koichi Kawasumi | 1992-10-06 |
| 4865945 | Positive photoresist material with o-quinone diazide and polymer containing silicon atoms | Tsutomu Noguchi, Keiichi Nito | 1989-09-12 |
| 4767696 | Laser information recording medium having an improved recording layer | Coe Ishimoto, Hiroshi Tomimuro | 1988-08-30 |
| 4753867 | Optical recording medium | Seiichi Arakawa, Hirofumi Kondo, Nobutoshi Asai | 1988-06-28 |
| 4693962 | Photochromic photosensitive compositions | Shinichiro Tamura | 1987-09-15 |
| 4565779 | Photochromic compounds and photosensitive compositions containing the compounds | Seiichi Arakawa, Hirofumi Kondo | 1986-01-21 |
| 4542084 | Method for forming a colored image | Haruo Watanabe, Kiyosuke Suzuki, Toshiaki Fukuma | 1985-09-17 |
| 4485168 | Photochromic photosensitive composition | Seiichi Arakawa, Koichi Kawasumi | 1984-11-27 |
| 4330600 | Magnetic recording medium | Kouichi Kawasumi, Haruo Watanabe | 1982-05-18 |
| 4247593 | Magnetic recording medium and method of preparing the same | Toru Nagai | 1981-01-27 |