Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6463195 | Method of manufacturing polarization-maintaining optical fiber coupler | Hideki Sasaki, Ryozo Yamauchi, Hiroshi Hidaka, Shigefumi Yamasaki, 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, Shigefumi Yamasaki | 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 |