Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7050672 | Polarization-maintaining optical fiber and polarization-maintaining optical fiber component | Ryokichi Matsumoto, Hideki Sasaki, Kenji Nishide, Ryozo Yamauchi | 2006-05-23 |
| 6463195 | Method of manufacturing polarization-maintaining optical fiber coupler | Hideki Sasaki, Ryozo Yamauchi, Hiroshi Hidaka, Kenji Nishide, Ryokichi Matsumoto +1 more | 2002-10-08 |
| 6459829 | Multiple wavelength excitation optical multiplexing device, multiple wavelength excitation light source incorporating aforementioned device, and optical amplifier | Ryozo Yamauchi, Akira Wada, Kenji Nishide | 2002-10-01 |
| 6442313 | Optical fiber grating and manufacturing method thereof | Ryozo Yamauchi, Akira Wada, Tetsuya Sakai, Nobuyuki Tanaka, Kensuke Shima +1 more | 2002-08-27 |
| 6298183 | Optical fiber grating and manufacturing method therefor | Ryozo Yamauchi, Akira Wada, Tetsuya Sakai, Nobuyuki Tanaka, Kensuke Shima +1 more | 2001-10-02 |
| 5848208 | Optical-fiber coupler and manufacturing process therefor | Fumio Suzuki, Hideki Sasaki, Tomio Abiru, Ryozo Yamauchi | 1998-12-08 |
| 5689578 | Polarized wave holding optical fiber, production method therefor, connection method therefor, optical amplifier, laser oscillator and polarized wave holding optical fiber coupler | Ryozo Yamauchi, Kuniharu Himeno, Minoru Sawada, Fumio Suzuki, Kazuhiko Aikawa +1 more | 1997-11-18 |