Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6833549 | Radiation detector, radiation imaging system, radiation detecting method and radiation imaging method | Masakazu Morishita | 2004-12-21 |
| 6785003 | Ring laser gyro with optically independent semiconductor ring lasers | Natsuhiko Mizutani | 2004-08-31 |
| 6741354 | Laser device having an optical waveguide for discerning movement of an optical gyroscope and an optical gyroscope utilizing same | — | 2004-05-25 |
| 6665330 | Semiconductor device having a semiconductor ring laser with a circularly formed ridge optical waveguide | — | 2003-12-16 |
| 6658039 | Ring laser and method for driving a ring laser | — | 2003-12-02 |
| 6656759 | Method of producing semiconductor element, semiconductor element, and gyroscope | Koichiro Nakanishi | 2003-12-02 |
| 6639680 | Ring laser gyro and driving method therefor with improved driving current | — | 2003-10-28 |
| 6631002 | Control of laser beams in a ring laser gyro | — | 2003-10-07 |
| 6603113 | Gyro comprising a ring laser in which beams of different oscillation frequencies coexist and propagate in mutually opposite circulation directions, driving method of gyro, and signal detecting method | — | 2003-08-05 |
| 6586725 | Optical gyro, driving method and signal processing method therefor | Natsuhiko Mizutani | 2003-07-01 |
| 6566155 | Method of manufacturing semiconductor device and gyro | — | 2003-05-20 |
| 6559949 | Gyro apparatus and gyroscope with multiple interfering laser beams affecting an electrical signal flowing therethrough | — | 2003-05-06 |
| 6501776 | Temperature-insensitive semiconductor laser | — | 2002-12-31 |
| 6493089 | Gyro and method of operating the same with a modulated frequency signal | — | 2002-12-10 |
| 6448552 | Gyro | Natsuhiko Mizutani | 2002-09-10 |
| 6445454 | Gyro having modulated frequency driven laser | — | 2002-09-03 |
| 6351311 | Ring laser gyro with an injected third beam | — | 2002-02-26 |
| 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, Yuichi Handa | 2001-12-25 |
| 6304329 | Gyro and semiconductor device having a plurality of laser diodes | Jun Nitta | 2001-10-16 |
| 6297883 | Ring laser gas gyro with beat signal detection from current, voltage, or impedance of the ring laser | — | 2001-10-02 |
| 6275296 | Semiconductor laser gyro with modulated driving power source | — | 2001-08-14 |
| 5469458 | Surface-emitting semiconductor device | — | 1995-11-21 |
| 5404240 | Optical switching system for optical wavelength-division and time-division multiplexed signals | Makoto Nishio | 1995-04-04 |
| 5153758 | Driving method and apparatus for a pnpn semiconductor device | Yoshiharu Tashiro, Kenichi Kasahara | 1992-10-06 |
| 5084897 | Optical filter device | — | 1992-01-28 |