Issued Patents All Time
Showing 51–71 of 71 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6754448 | Multiplex transmission apparatus | — | 2004-06-22 |
| 6690893 | Optical transmitter | Jun Ohya | 2004-02-10 |
| 6687465 | FM modulator | Kuniaki Utsumi, Satoshi Furusawa | 2004-02-03 |
| 6626588 | Optical transmission apparatus | Hiroyuki Sasai, Tsuyoshi Ikushima | 2003-09-30 |
| 6556327 | Signal converter, optical transmitter and optical fiber transmission system | Jun Ohya, Seiichiro Kawashima | 2003-04-29 |
| 6532099 | Optical communications apparatus | — | 2003-03-11 |
| 6512619 | Frequency modulation apparatus | — | 2003-01-28 |
| 6512621 | FM modulator | Kuniaki Utsumi, Satoshi Furusawa | 2003-01-28 |
| 6496304 | Optical amplifying device | Toru Shiozaki | 2002-12-17 |
| 6486986 | System for optically transmitting frequency-division-multiplexed signal and transmitter therefor | — | 2002-11-26 |
| 6437908 | Optical amplifying device | Toru Shiozaki | 2002-08-20 |
| 6335814 | Optical transmission system and optical transmitter and optical receiver used therefor | Jun Ohya | 2002-01-01 |
| 6211996 | Angle modulator | — | 2001-04-03 |
| 6078412 | Optical transmitter and optical transmission system using the same | Kuniaki Utsumi | 2000-06-20 |
| 5973820 | FM modulation device | Kuniaki Utsumi, Seiichiro Kawashima, Koji Kikushima | 1999-10-26 |
| 5923458 | Frequency modulator | Katsuyuki Fujito, Koji Kikushima | 1999-07-13 |
| 5768449 | Optical transmission system and optical transmission method | Katsuyuki Fujito | 1998-06-16 |
| 5541757 | Optical fiber cable service system provided with video on demand service | Hiroaki Nakata, Katsuyuki Fujito | 1996-07-30 |
| 5539657 | Picture image distributing apparatus provided within passenger moving vehicle | Kuniaki Utsumi, Hiroaki Nakata, Susumu Morikura, Hiroaki Yamamoto, Kazuki Maeda | 1996-07-23 |
| 5444562 | Apparatus for transmitting an intensity-modulated light signal | — | 1995-08-22 |
| 5140417 | Fast packet transmission system of video data | Tsutomu Tanaka, Hiroshi Yokota | 1992-08-18 |