Issued Patents All Time
Showing 51–75 of 86 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5909297 | Drift compensating circuit for optical modulators in an optical system | George Ishikawa, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1999-06-01 |
| 5898806 | Optical interconnection circuit structure | — | 1999-04-27 |
| 5896217 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | George Ishikawa, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1999-04-20 |
| RE36088 | Optical transmitter | Naoki Kuwata | 1999-02-09 |
| 5870213 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | George Ishikawa, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1999-02-09 |
| 5815294 | Optical transmission system with transmission characteristic measuring device | George Ishikawa, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1998-09-29 |
| 5805321 | Control unit for optical modulators producing multiplexed optical output signal | Hiroki Ooi, George Ishikawa | 1998-09-08 |
| 5760937 | Optical demultiplexer | George Ishikawa, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1998-06-02 |
| 5754322 | Optical transmission system, optical multiplexing transmission system, and related peripheral techniques | George Ishikawa, Hiroki Ooi, Motoyoshi Sekiya, Hiroaki Tomofuji | 1998-05-19 |
| 5717510 | Optimized optical transmission system for high capacity transmission | George Ishikawa | 1998-02-10 |
| 5712933 | Waveguide-type optical device | Tetsuyuki Suzaki | 1998-01-27 |
| 5687265 | Optical control device and method for making the same | Toshiyuki Kambe | 1997-11-11 |
| 5661830 | Waveguide-type optical control device | — | 1997-08-26 |
| 5617493 | Waveguide type optical control device with properties of suppressed DC drift, reduced driving voltage and high speed operation | — | 1997-04-01 |
| 5548673 | Optical coupling device | Naoki Kitamura | 1996-08-20 |
| 5546488 | Waveguide-type optical path converter for converting a propagation direction of a light | Naoki Kitamura | 1996-08-13 |
| 5499732 | Method for fabricating an optical device | — | 1996-03-19 |
| 5483012 | Electrodepositable coating composition | Susumu Midogohchi, Masafumi Kume, Takahisa Kasukawa, Tetsuya Takasu | 1996-01-09 |
| 5479552 | Waveguide-type optical device | Naoki Kitamura | 1995-12-26 |
| 5408569 | Optical channel waveguide having a high germania cladding content | — | 1995-04-18 |
| 5383046 | Supervisory and control signal transmitting system for use in optically amplifying repeaters system | Hiroaki Tomofuji, Akihiko Sugata | 1995-01-17 |
| 5364908 | Process for making resin composition and resin composition | Masafumi Oishi, Takao Ando, Yukio Shibata, Toshiaki Okamoto, Katsura Gohda | 1994-11-15 |
| 5359449 | Optical modulator for an optical transmitter | Hironao Hakogi, Takatoshi Minami | 1994-10-25 |
| 5317443 | Optical transmitter | — | 1994-05-31 |
| 5185830 | Optical waveguide directional coupler including control electrodes | — | 1993-02-09 |