Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6819828 | Method and device for optical fiber transmission | Tsukasa Takahashi, Yoichi Oikawa | 2004-11-16 |
| 6674567 | Raman excitation control method and optical transmission system using the same | Futoshi Izumi, Shota Mori, Tsukasa Takahashi, Hideki Kobayashi | 2004-01-06 |
| 6621620 | Optical amplification system using Raman amplification | — | 2003-09-16 |
| 6532102 | Optical amplifier | Hideki Kobayashi, Tsukasa Takahashi, Futoshi Izumi, Shota Mori | 2003-03-11 |
| 6238102 | Multiaxial optical coupler | Tomoyuki Itoh, Yoshinobu Kubota, Takehito Tanaka | 2001-05-29 |
| 6109108 | Electromagnetic acoustic transducer EMAT and inspection system with EMAR | Hirotsugu Ogi, Masahiko Hirao | 2000-08-29 |
| 6046839 | Polarizaiton scrambler | Tomoyuki Ito, Yoshinobu Kubota, Yasuhiro Omori | 2000-04-04 |
| 6038925 | Focal type electromagnetic acoustic transducer and flaw detection system and method | Hirotsugu Ogi, Masahiko Hirao | 2000-03-21 |
| 6033126 | Optical waveguide module having improved high-frequency characteristics | Yasuhiro Omori, Yoshinobu Kubota, Tomoyuki Itoh | 2000-03-07 |
| 5811682 | Electromagnetic acoustic transducer EMAT and inspection system with EMAR | Hirotsugu Ogi, Masahiko Hirao | 1998-09-22 |
| 4998033 | Gas dynamic bearing for spindle motor | Yasushi Hisabe, Noriyuki Osada, Masahiko Kishi, Yoshio Sato, Daisuke Konno +6 more | 1991-03-05 |
| 4984881 | Rotation supporting device of a polygon mirror | Noriyuki Osada, Yasushi Hisabe, Toshiya Kanamori | 1991-01-15 |