Issued Patents All Time
Showing 1–25 of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6180224 | Method of absorbing rays outside a visible region | Masuhiro Shouji, Hiroki Katono, Takeo Ogihara, Osamu Tanegashima | 2001-01-30 |
| 6054503 | Plastic lens material and process for preparing the same | Yukio Ichikawa | 2000-04-25 |
| 5820779 | Polymeric optical low-pass filter and device thereof | Masuhiro Shouji, Takeo Ogihara, Hiroki Katono, Hiroshi Hasebe, Haruyoshi Takatu | 1998-10-13 |
| 5793544 | Production process of composite optical filter | Takeo Ogihara, Hiroki Katono, Masuhiro Shouji | 1998-08-11 |
| 5777000 | Plastic lens and production process thereof | Akira Saito | 1998-07-07 |
| 5759448 | Plastic optical material | Hiroki Katono, Masuhiro Shouji, Takeo Ogihara | 1998-06-02 |
| 5691838 | Infrared-blocking optical fiber | Masuhiro Shouji, Hiroki Katono, Takeo Ogihara | 1997-11-25 |
| 5672655 | Plastic optical material and production process thereof | Hiroki Katono, Masuhiro Shouji, Takeo Ogihara | 1997-09-30 |
| 5611965 | Plastic optical filter | Masuhiro Shouji, Takeo Ogihara, Hiroki Katono | 1997-03-18 |
| 5567778 | Process for producing an optical filter | Takeo Ogihara, Yasufumi Fujii, Hiroki Katono | 1996-10-22 |
| 5466755 | Optical filter | Takeo Ogihara, Yasufumi Fujii, Hiroki Katono | 1995-11-14 |
| 5288844 | High-refractive index plastic optical material | — | 1994-02-22 |
| 5086140 | Optical material formed by casting polymerization of a phenyl phosphine monomer | Hideaki Doi | 1992-02-04 |
| 5017698 | Spirooxazine photochromic compounds | Katsuichi Machida, Akira Saito | 1991-05-21 |
| 4975223 | Optical material | Hideaki Doi | 1990-12-04 |
| 4959431 | Optical material | Nobuhiro Watanabe | 1990-09-25 |
| 4931523 | Plastic lens | Nobuhiro Watanabe | 1990-06-05 |
| 4826284 | Resin-made heat-resistant optical fiber | Yasufumi Fujii | 1989-05-02 |
| 4784915 | Polymer piezoelectric film | Kenichi Nakamura, Naohiro Murayama | 1988-11-15 |
| 4775590 | Optical fiber | Naohiro Murayama | 1988-10-04 |
| 4756973 | Photochromic lens | Katsuichi Machida, Yasufumi Fujii, Noriyuki Arakawa, Naohiro Murayama | 1988-07-12 |
| 4704006 | Halogen-containing resin lens material | Yasufumi Fujii, Naohiro Murayama | 1987-11-03 |
| 4650833 | Thin transparent polytetrafluoroethylene film and production process thereof | Noriyuki Arakawa, Naohiro Murayama | 1987-03-17 |
| 4644025 | Lens materials of high refractive indexes | Yasufumi Fujii, Naohiro Murayama | 1987-02-17 |
| 4615943 | Vinylidene fluoride copolymer film | Noriyuki Arakawa, Naohiro Murayama | 1986-10-07 |