Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8194248 | Alignment optimization for optical packages | Vikram Bhatia, Steven Joseph Gregorski, Fumio Nagai | 2012-06-05 |
| 7835081 | Diffractive optical element and bidirectional optical communication module using the same | — | 2010-11-16 |
| 7708471 | Bi-directional optical module | Kazumi Furuta | 2010-05-04 |
| 7121741 | Optical communication module | Kazumi Furuta, Makiko Imae | 2006-10-17 |
| 7056037 | Optical bidirectional module | Kazumi Furuta, Hiroaki Ueda, Manami Kuiseko, Koujirou Sekine, Mitsuru Yokoyama +2 more | 2006-06-06 |
| 7027466 | Multiplexer, demultiplexer and multiplex communication system | — | 2006-04-11 |
| 6747776 | Semiconductor optical modulator, optical multiplexing module, and control method thereof | Kozo Fujii | 2004-06-08 |
| 6714754 | Developing roller for electrophotography, developing apparatus, apparatus unit and image forming apparatus | Katsuhiro Sakaizawa, Makoto Nonomura, Manami Sekiguchi | 2004-03-30 |
| 6493125 | Apparatus for stabilizing light source frequency | Kazuo Tanaka | 2002-12-10 |
| 6484007 | Image forming apparatus featuring a conductive developing roller including a mandrel, an elastic layer, an intermediate layer, and a charge-providing layer formed thereon | Katsuhiro Sakaizawa, Makoto Nonomura, Manami Sekiguchi | 2002-11-19 |
| 6400497 | Optical fiber amplifier | Mikiya Suzuki, Shigeru Shikii, Shusei Aoki | 2002-06-04 |
| 6389253 | Image forming apparatus featuring a regulating member for regulating a number of layers of a developer carried by a developer carrying member | Makoto Nonomura, Katsuhiro Sakaizawa, Manami Sekiguchi | 2002-05-14 |
| 6376087 | Developing agent carrier, developing unit, and image forming apparatus | Katsuhiro Sakaizawa | 2002-04-23 |
| 6229980 | Developing apparatus featuring first and second developer chambers and guide member for directing stripped-off developer | Kenya Ogawa, Katsuhiro Sakaizawa, Takeshi Yamamoto | 2001-05-08 |
| 6215941 | Optical delay time adjuster and optical time-division multiplexer | Kiyoshi Nagai | 2001-04-10 |
| 5805328 | Driving circuit for an optical signal modulator | Hideaki Satoh, Kazuo Tanaka | 1998-09-08 |
| 5587773 | Electrophotographic apparatus for performing image exposure and development simultaneously | Hideyuki Yano, Junji Araya, Harumi Kugo, Katsuhiro Sakaizawa, Tadashi Furuya +1 more | 1996-12-24 |
| 5436709 | Fixing device which controls an energizing condition of a heater after fixing operation | Katsuhiro Sakaizawa | 1995-07-25 |
| 5172382 | Ultrahigh frequency optical self-modulator | Wei-Hung Loh, Alfred T. Schremer, Chung L. Tang | 1992-12-15 |