Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7526155 | Rotary joint | Masahisa Sakai | 2009-04-28 |
| 6867929 | Light source device | Francisco-José López-Hernández, Juan-Carlos Mi{overscore (n)}ano-Dominguez, Pablo Benitez-Giménez, Masahisa Sakai | 2005-03-15 |
| 5959754 | Optical wireless communication system | Yoshitaka Sakurai, Kazuo ICHIHARA, Takaaki Takeda, Takeshi Nomoto | 1999-09-28 |
| 5926302 | Bi-directional optical wireless communication apparatus and method of Bi-directional optical wireless communication | Atsushi Sakamoto, Manabu Sakane | 1999-07-20 |
| 5600471 | Optical wireless data transmission system and optical wireless data transmitting/receiving apparatus | Yoshiaki Yunoki | 1997-02-04 |
| 5532858 | Optical radio transmission system and a method for adjusting optical axes thereof | Teruhiko Shinomiya, Manabu Sakane, Keishi Ushijima, Takaaki Takeda, Masamichi Satou +2 more | 1996-07-02 |
| 5349463 | Optical radio repeater with signal quality detection | Hiroshi Horii, Hideo Koike, Yoshiaki Yunoki, Tetsuo Fukasawa, Susumu Katayama +7 more | 1994-09-20 |
| 5289306 | Repeater system | Akio Yoshikawa, Takaaki Takeda, Takeshi Nomoto, Keishi Ushijima | 1994-02-22 |
| 4698693 | Audio magnetic recording and/or reproducing apparatus utilizing frequency modulation | Yukinobu Ishigaki, Yasuomi Namiki, Hisashige Fujiwara | 1987-10-06 |
| 4614910 | Quarternary differential PSK demodulator | Yukinobu Ishigaki | 1986-09-30 |
| 4577161 | Noise reduction by linear interpolation using a dual function amplifier circuit | Yukinobu Ishigaki, Yasuomi Namiki | 1986-03-18 |
| 4574390 | Noise reduction for stereophonic FM signals by high-speed sampling and linear interpolation | Yukinobu Ishigaki | 1986-03-04 |
| 4539527 | Noise reduction by linear interpolation using a dual function amplifier circuit | Yukinobu Ishigaki | 1985-09-03 |
| 4532475 | Impulse noise reduction by linear interpolation having a deemphasis characteristic | Yukinobu Ishigaki | 1985-07-30 |
| 4531095 | Impulse noise reduction by linear interpolation having immunity to white noise | Yukinobu Ishigaki | 1985-07-23 |