Issued Patents All Time
Showing 26–50 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7991298 | DSB-SC modulation system capable of erasing carrier and secondary component | Masayuki Izutsu, Takahide Sakamoto, Masahiro Tsuchiya | 2011-08-02 |
| 7986452 | High-speed multiplied signal generating method and device | Takahide Sakamoto, Masahiro Tsuchiya | 2011-07-26 |
| 7962039 | Multiple wavelength light source, and generation method for multiple wavelength light | Masayuki Izutsu | 2011-06-14 |
| 7957652 | Optical FSK/SSB modulator having intensity balance function | Masayuki Izutsu, Takahide Sakamoto, Masahiro Tsuchiya | 2011-06-07 |
| 7957653 | Phase control optical FSK modulator | Masayuki Izutsu, Takahide Sakamoto, Masahiro Tsuchiya | 2011-06-07 |
| 7936996 | Automatic adjusting system of frequency shift keying modulator | Masayuki Izutsu, Takahide Sakamoto, Masahiro Tsuchiya | 2011-05-03 |
| 7864330 | Method and device for calibrating a light intensity measurement device | Masayuki Izutsu, Takahide Sakamoto, Masahiro Tsuchiya | 2011-01-04 |
| 7853153 | Fourth harmonic generating system using optical double side-band suppressed carrier modulator | Masayuki Izutsu, Takahide Sakamoto, Masahiro Tsuchiya | 2010-12-14 |
| 7787121 | Imaging apparatus | Kazuhiro Tsujita, Hiroshi Sunagawa, Katsuya Kikuchi | 2010-08-31 |
| 7711215 | Optical amplitude modulation system capable of cancelling high order component | Masayuki Izutsu, Takahide Sakamoto, Masahiro Tsuchiya | 2010-05-04 |
| 7689067 | Nested modulator | Junichiro Ichikawa, Kaoru Higuma, Futoshi Yamamoto, Satoshi Oikawa, Shingo Mori +4 more | 2010-03-30 |
| 7660030 | Reciprocating optical modulation system | Masayuki Izutsu, Takahide Sakamoto, Masahiro Tsuchiya | 2010-02-09 |
| 7657139 | Y-junction reflector tunable delay or resonator waveguide devices | Jianxiao Chen, Paul Kit Lai Yu, Kaoru Higuma | 2010-02-02 |
| 7555223 | UWB signal generator using optical FSK modulator | Masayuki Izutsu | 2009-06-30 |
| 7526209 | Optical frequency shift keying modulator | Masayuki Izutsu | 2009-04-28 |
| 7522844 | Multiple-wavelength optical modulation apparatus | Masayuki Izutsu | 2009-04-21 |
| 7425696 | Photoelectric oscillator | Masayuki Izutsu, Takahide Sakamoto, Satoshi Shinada | 2008-09-16 |
| 7421209 | Optical wavelength multiplexing FSK modulation method | Masayuki Izutsu | 2008-09-02 |
| 7317569 | Optical frequency converter | — | 2008-01-08 |
| 7245787 | Bias adjustment method for optical SSB modulator or optical FSK modulator | Masayuki Izutsu | 2007-07-17 |
| 7239763 | Optical SSB modulator | Masayuki Izutsu, Kaoru Higuma, Shingo Mori | 2007-07-03 |
| 7236661 | Tunable dispersion compensation apparatus | Masayuki Izutsu, Sze Yun Set, Mark Jablonski, Yuuichi Tanaka | 2007-06-26 |
| 7212331 | Reciprocating optical modulator | Masayuki Izutsu | 2007-05-01 |
| 7133190 | Optical frequency converter | — | 2006-11-07 |
| 7106497 | Low-noise optical frequency converter | Masayuki Izutsu | 2006-09-12 |