Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7067074 | Near-infrared-absorbing composition and optical material | Tsukasa Ikeda, Hiroki Katono, Masuhiro Syouji | 2006-06-27 |
| 7053231 | Building material | Naoki Hayashi, Hiroki Katono | 2006-05-30 |
| 7025908 | Optical filter and process for producing the same | Naoki Hayashi, Hiroki Katono, Masuhiro Syouji, Tomoyoshi Koizumi | 2006-04-11 |
| 6562992 | Optical material | Naoki Hayashi, Shigeru Mizusawa, Tomoyoshi Koizumi | 2003-05-13 |
| 5017698 | Spirooxazine photochromic compounds | Akira Saito, Teruo Sakagami | 1991-05-21 |
| 4756973 | Photochromic lens | Teruo Sakagami, Yasufumi Fujii, Noriyuki Arakawa, Naohiro Murayama | 1988-07-12 |