Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10944481 | Coherent sampling | — | 2021-03-09 |
| 10911153 | High-speed photodetector array | Toshimasa Umezawa, Atsushi Kanno, Naokatsu Yamamoto, Tetsuya Kawanishi | 2021-02-02 |
| 10514587 | Interval control-type optical comb | Naokatsu Yamamoto, Atsushi Matsumoto | 2019-12-24 |
| 10090918 | Collective acquisition-type photodetection device and photodetection method having a time delay adjustment unit wherein each time-adjusted optical signal train is photomixed with an optical frequency comb at different timings in a photomixer | — | 2018-10-02 |
| 9954615 | Optical up/down conversion-type optical phase conjugate pair signal transmission/reception circuit | — | 2018-04-24 |
| 8682177 | Super high speed optical frequency sweeping technology | Tetsuya Kawanishi, Masahiro Tsuchiya | 2014-03-25 |
| 8676060 | Quadrature amplitude modulation signal generating device | Tetsuya Kawanishi, Akito Chiba, Masahiro Tsuchiya | 2014-03-18 |
| 8472107 | High-speed multiplied signal generating method and device | Tetsuya Kawanishi, Masahiro Tsuchiya | 2013-06-25 |
| 8270780 | Optical switch system using optical interference | Tetsuya Kawanishi, Masayuki Izutsu, Masahiro Tsuchiya | 2012-09-18 |
| 8023775 | Super flat optical frequency comb signal generator | Tetsuya Kawanishi, Masahiro Tsuchiya, Masayuki Izutsu | 2011-09-20 |
| 7991298 | DSB-SC modulation system capable of erasing carrier and secondary component | Tetsuya Kawanishi, Masayuki Izutsu, Masahiro Tsuchiya | 2011-08-02 |
| 7986452 | High-speed multiplied signal generating method and device | Tetsuya Kawanishi, Masahiro Tsuchiya | 2011-07-26 |
| 7957652 | Optical FSK/SSB modulator having intensity balance function | Tetsuya Kawanishi, Masayuki Izutsu, Masahiro Tsuchiya | 2011-06-07 |
| 7957653 | Phase control optical FSK modulator | Tetsuya Kawanishi, Masayuki Izutsu, Masahiro Tsuchiya | 2011-06-07 |
| 7936996 | Automatic adjusting system of frequency shift keying modulator | Tetsuya Kawanishi, Masayuki Izutsu, Masahiro Tsuchiya | 2011-05-03 |
| 7864330 | Method and device for calibrating a light intensity measurement device | Tetsuya Kawanishi, Masayuki Izutsu, Masahiro Tsuchiya | 2011-01-04 |
| 7853153 | Fourth harmonic generating system using optical double side-band suppressed carrier modulator | Tetsuya Kawanishi, Masayuki Izutsu, Masahiro Tsuchiya | 2010-12-14 |
| 7711215 | Optical amplitude modulation system capable of cancelling high order component | Tetsuya Kawanishi, Masayuki Izutsu, Masahiro Tsuchiya | 2010-05-04 |
| 7660030 | Reciprocating optical modulation system | Tetsuya Kawanishi, Masayuki Izutsu, Masahiro Tsuchiya | 2010-02-09 |
| 7425696 | Photoelectric oscillator | Tetsuya Kawanishi, Masayuki Izutsu, Satoshi Shinada | 2008-09-16 |
| 4673877 | Zirconium liner thickness measuring method and an apparatus therefor for a zirconium alloy tube | Tatsuo Hiroshima | 1987-06-16 |
| 4641092 | Rotary probe apparatus for detecting flaws in a test object | Tatsuo Hiroshima, Noriyuki Matsubara, Kenichi Miyata | 1987-02-03 |
| 4336923 | Steel surface inspection apparatus | Toshio Shiraiwa, Tatsuo Hiroshima | 1982-06-29 |
| 4337099 | Method and apparatus for conditioning of steel surface | Tatsuo Hiroshima | 1982-06-29 |
| 4318439 | Hot steel cutting apparatus | Tatsuo Hiroshima, Kenichi Matsui, Ichiroh Ohgaki | 1982-03-09 |