Issued Patents All Time
Showing 126–150 of 174 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6321002 | Optical amplifier, optical transmission equipment, optical transmission system, and method thereof | Junya Kosaka, Takayuki Suzuki | 2001-11-20 |
| 6314217 | Optical transmission device and optical transmission system employing the same | Junya Kosaka, Takayuki Suzuki | 2001-11-06 |
| 6283264 | Hydraulic power transmission joint | Tadahiko Kato, Kazuhisa Shimada, Kiyonori Hirao, Yoshiaki Tajima, Toshiharu Takasaki +2 more | 2001-09-04 |
| 6266169 | Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 2001-07-24 |
| 6262402 | Method and apparatus for joining metal pieces using induction heating | Shigeru Isoyama, Takeshi Hirabayashi, Hideyuki Nikaido, Toshiaki Amagasa, Nozomu Tamura +18 more | 2001-07-17 |
| 6252211 | Method of joining metal pieces | Shigeru Isoyama, Takeshi Hirabayashi, Hideyuki Nikaido, Toshiaki Amagasa, Nozomu Tamura +18 more | 2001-06-26 |
| 6248984 | Method and apparatus for joining metal pieces | Shigeru Isoyama, Takeshi Hirabayashi, Hideyuki Nikaido, Toshiaki Amagasa, Nozomu Tamura +18 more | 2001-06-19 |
| 6229936 | Optical amplifier, optical transmission equipment, optical transmission system, and method thereof | Junya Kosaka, Takayuki Suzuki | 2001-05-08 |
| 6218649 | Method and apparatus for joining metal pieces using induction heating | Shigeru Isoyama, Takeshi Hirabayashi, Hideyuki Nikaido, Toshiaki Amagasa, Nozomu Tamura +18 more | 2001-04-17 |
| 6195480 | Optical transmission device and optical transmission system employing the same | Junya Kosaka, Takayuki Suzuki | 2001-02-27 |
| 6184508 | Apparatus for joining metal pieces using induction heating | Shigeru Isoyama, Takeshi Hirabayashi, Hideyuki Nikaido, Toshiaki Amagasa, Nozomu Tamura +18 more | 2001-02-06 |
| 6153444 | Method of measuring free carrier concentration and/or thickness of a semiconductor and process of manufacturing semiconductor device and semiconductor wafer using such method | Kenji Taniguchi | 2000-11-28 |
| 6091540 | Optical amplifier | — | 2000-07-18 |
| 6018405 | Optical transmission equipment which transmits an amplified optical data signal and an optical surveillance signal | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 2000-01-25 |
| 6005699 | Optical wavelength multiplexing system | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1999-12-21 |
| 5951903 | Method and apparatus for joining metal pieces | Shigeru Isoyama, Takeshi Hirabayashi, Hideyuki Nikaido, Toshiaki Amagasa, Nozomu Tamura +18 more | 1999-09-14 |
| 5875046 | Optical repeater and optical transmitter | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1999-02-23 |
| 5864424 | Optical signal amplifying circuit | — | 1999-01-26 |
| 5861972 | Optical multiplex transmission equipment and method | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1999-01-19 |
| 5831754 | Optical amplifier | — | 1998-11-03 |
| 5812289 | Optical repeater and optical transmitter | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1998-09-22 |
| 5749996 | Method of producing reclaimed joint sheet and the reclaimed jointsheet | Tsutomu Tomizawa, Yoshihiko Tatemichi, Ken Fujiwara, Masamichi Hoshi | 1998-05-12 |
| 5739932 | Optical transmission system constructing method and system | Keiji Tomooka, Naohiro Sakakida, Shin Nishimura, Yoshihiro Ashi, Hironari Matsuda +6 more | 1998-04-14 |
| 5712632 | Navigation apparatus for land vehicle inputting road traffic information | Shigeki Nishimura, Masahiro Nakajima | 1998-01-27 |
| 5706125 | Optical signal amplifying circuit | — | 1998-01-06 |