Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7239764 | Optical waveguide device with reduced driving voltage | Masaharu Doi, Tadao Nakazawa, Masaki Sugiyama | 2007-07-03 |
| 6865306 | Optical device | Masaharu Doi, Shinji Taniguchi, Masaaki Norimatsu | 2005-03-08 |
| 6807915 | Method of carbonization of organic waste and apparatus therefor | Masahiro Sugano, Yoshihiro NAGASHIMA, Masashi Ibata | 2004-10-26 |
| 6801675 | Optical modulator | Masaharu Doi, Shinji Taniguchi, Masaki Sugiyama | 2004-10-05 |
| 6584240 | Optical modulator having ridge and associated structure on substrate | Masaharu Doi, Shinji Taniguchi, Masaki Sugiyama | 2003-06-24 |
| 6580843 | Optical device | Masaharu Doi, Shinji Taniguchi, Masaaki Norimatsu | 2003-06-17 |
| 6175715 | Double-sided printing apparatus | Naoto Hirao, Kenji Fuke, Katsuya Shimatsu | 2001-01-16 |
| 6055401 | Electrophotographic image-forming apparatus having developing device which includes a plurality of developing rollers | Yoshihiro Tonomoto, Hiroshi Sato, Toshio Hino, Toshimasa Toyama, Osamu Watanabe +4 more | 2000-04-25 |
| 5905930 | Image forming apparatus | Toshimasa Toyama, Toshio Hino, Yoshihiro Tonomoto, Naoto Hirao, Yoshinori Wada +3 more | 1999-05-18 |
| 5887236 | Image forming apparatus | Naoto Hirao, Yoshihiro Tonomoto, Toshimasa Toyama, Mituaki Ono, Kiyoshi Chinzei +1 more | 1999-03-23 |