Issued Patents All Time
Showing 26–44 of 44 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10224826 | Control apparatus determining transformer magnetization in a DC/DC converter based on difference between primary and secondary currents | Seiji Iyasu, Yuji Hayashi | 2019-03-05 |
| 10075059 | Current detection apparatus and power conversion apparatus | Seiji Iyasu, Yuji Hayashi, Kimikazu Nakamura | 2018-09-11 |
| 10050513 | Control apparatus capable of appropriately suppressing a surge voltage | Seiji Iyasu, Yuji Hayashi, Kimikazu Nakamura | 2018-08-14 |
| 9660867 | Communication management program and client apparatus | Seiichiro Tanaka, Minoru Saito, Kazuya Hashimoto, Daisuke Maeno | 2017-05-23 |
| 6334014 | Optical fiber apparatus provided with demultiplexing/multiplexing unit on fiber's end portion, optical detecting apparatus provided with demultiplexing/multiplexing unit on its light receiving surface, and optical transmission system using the same | Jun Nitta, Takahiro Numai | 2001-12-25 |
| 6008675 | Polarization-mode selective semiconductor laser with a bending channel stripe, apparatus including the same and optical communication system using the same | — | 1999-12-28 |
| 5926497 | Diffraction grating with alternately-arranged different regions, optical semiconductor device with the diffraction grating, and apparatus and optical communication system using the same | Jun Nitta, Hidetoshi Nojiri | 1999-07-20 |
| 5901166 | Oscillation polarization mode selective semiconductor laser, light transmitter and optical communication system using the laser | Jun Nitta | 1999-05-04 |
| 5862165 | Variable wavelength light source using a laser, wavelength control method, optical communication system and optical communication method | Masao Majima, Jun Nitta | 1999-01-19 |
| 5379142 | Demultiplexing apparatus and optical communication system using the demultiplexing apparatus | — | 1995-01-03 |
| 5369719 | Optical device with an optical coupler for effecting light branching and/or combining and an optical amplifier | Seiji Mishima | 1994-11-29 |
| 5239600 | Optical device with an optical coupler for effecting light branching/combining by splitting a wavefront of light | Mitsutoshi Hasegawa | 1993-08-24 |
| 5239410 | Method and apparatus for light amplification exhibiting a flat gain spectrum | Michiyo Nishimura | 1993-08-24 |
| 4935930 | Laser light source for generating beam collimated in at least one direction | — | 1990-06-19 |
| 4887255 | Integrated optical head | Masahiro Okuda, Hiroshi Osawa | 1989-12-12 |
| 4815027 | Optical operation apparatus for effecting parallel signal processing by detecting light transmitted through a filter in the form of a matrix | Jun Tokumitsu, Kenji Saito, Nobuyoshi Tanaka, Hidetoshi Nojiri | 1989-03-21 |
| 4793675 | Element having light waveguides and method of making same | — | 1988-12-27 |
| 4776661 | Integrated optical device | — | 1988-10-11 |
| 4707059 | Integrated optical circuit element and method of making the same | Shigetaro Ogura | 1987-11-17 |