Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7050672 | Polarization-maintaining optical fiber and polarization-maintaining optical fiber component | Ryokichi Matsumoto, Hideki Sasaki, Ryozo Yamauchi, Shigefumi Yamasaki | 2006-05-23 |
| 6836418 | Slant short-period grating | Akira Sakamoto, Masaaki Sudo, Reiko Kojima, Tomosada Inada, Satoshi Okude | 2004-12-28 |
| 6819834 | Optical fiber grating, optical fiber grating manufacturing method, and optical fiber grating manufacturing apparatus | Yuu Ishii, Michihiro Nakai, Satoshi Okude, Kensuke Shima | 2004-11-16 |
| 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 |
| 6298183 | Optical fiber grating and manufacturing method therefor | Ryozo Yamauchi, Akira Wada, Tetsuya Sakai, Nobuyuki Tanaka, Kensuke Shima +1 more | 2001-10-02 |
| 5024501 | Manufacturing method for polarization maintaining optical fiber couplers | Hiroyuki Taya, Mikio Yoshinuma, Takeshi Yamada, Fumio Suzuki, Hirohisa Fujimoto +1 more | 1991-06-18 |