Issued Patents All Time
Showing 26–49 of 49 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6771358 | Branch line monitoring system and branch line monitoring method | Hiroo Kanamori | 2004-08-03 |
| 6766080 | Optical waveguide type defraction grating device and a method of manufacturing thereof | Masaki Ohmura | 2004-07-20 |
| 6738183 | Optical filter functioning as both a gain equalizer and noise-light blocking filter | — | 2004-05-18 |
| 6665472 | Optical filter having cascaded long-period gratings | Michiko Takushima, Hiroshi Suganuma | 2003-12-16 |
| 6580854 | Optical waveguide grating and method of making the same | Tadashi Enomoto, Shinji Ishikawa, Michiko Harumoto | 2003-06-17 |
| 6563984 | Long-period grating device | Michiko Harumoto, Shinji Ishikawa, Tadashi Enomoto | 2003-05-13 |
| 6522810 | Optical loss filter | Michiko Takushima, Shinji Ishikawa | 2003-02-18 |
| 6504962 | Method for determining an aging condition for an optical waveguide grating and temperature sensor | Shinji Ishikawa, Toru Iwashima, Michiko Harumoto, Akira Inoue | 2003-01-07 |
| 6490078 | Optical fiber for optical amplifier, optical fiber amplifier and optical fiber laser | Tadashi Enomoto, Masahiro Takagi, Yuichi Ohga, Motoki Kakui, Shinji Ishikawa +1 more | 2002-12-03 |
| 6487340 | Optical fiber grating element, production method, and optical fiber filter | Tadashi Enomoto, Shinji Ishikawa, Michiko Takushima | 2002-11-26 |
| 6483955 | Diffraction grating device | Manabu Shiozaki, Toru Iwashima, Kiyotaka Murashima | 2002-11-19 |
| 6415078 | Laser light source and manufacturing method therefor | Masayuki Shigematsu, Takashi Kato | 2002-07-02 |
| 6337937 | Optical filter and method of making the same | Michiko Takushima | 2002-01-08 |
| 6317538 | Optical waveguide device and optical device having long-period grating | Masayuki Shigematsu, Motoki Kakui | 2001-11-13 |
| 6292607 | Method for determining an aging condition for an optical waveguide grating and temperature sensor | Shinji Ishikawa, Toru Iwashima, Michiko Takushima (nee Harumoto), Akira Inoue | 2001-09-18 |
| 6253008 | Optical filter and method of making the same | Michiko Harumoto | 2001-06-26 |
| 6144784 | Optical input/output module and light-reflecting device | Shinji Ishikawa, Motoki Kakui, Hiroo Kanamori, Masayuki Nishimura | 2000-11-07 |
| 6141466 | Wavelength-variable light source and OTDR apparatus | — | 2000-10-31 |
| 6067392 | Optical fiber diffraction grating, a method of fabricating thereof and a laser light source | Toshinori Wakami, Masayuki Shigematsu, Yoshiaki Terasawa, Akira Inoue, Toru Iwashima | 2000-05-23 |
| 5993073 | Semiconductor laser module | Atsushi Hamakawa | 1999-11-30 |
| 5859945 | Array type light emitting element module and manufacturing method therefor | Takashi Kato | 1999-01-12 |
| 5790726 | Optical waveguide and process for producing it | Masumi Ito, Maki Inai, Akira Inoue | 1998-08-04 |
| 5771250 | Laser light source apparatus, OTDR apparatus, and optical communication line inspection system | Akira Inoue | 1998-06-23 |
| 5627933 | Optical waveguide and process for producing it | Masumi Ito, Maki Inai, Akira Inoue | 1997-05-06 |