Issued Patents All Time
Showing 1–25 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9703035 | Optical connector, method for manufacturing the same, and mold container for manufacturing the same | — | 2017-07-11 |
| 7035518 | Polymer waveguides and process for producing the same | — | 2006-04-25 |
| 6830818 | Polymer material and polymer film | Hiroshi Tsushima, Emi Watanabe | 2004-12-14 |
| 5916460 | Method and apparatus for dicing a substrate | Shinobu Sato | 1999-06-29 |
| 5742722 | Rare earth element-doped multiple-core optical fiber and optical systems using the samefield of the invention | — | 1998-04-21 |
| 5712941 | Rare earth element-doped multiple-core optical fiber and method for fabricating the same | Kazuo Koya, Jun Abe | 1998-01-27 |
| 5706124 | Rare earth element-doped optical fiber amplifier | Kazuo Koya, Jun Abe | 1998-01-06 |
| 5703987 | Rare earth element-doped multiple-core optical fiber and optical systems using the same field of the invention | — | 1997-12-30 |
| 5570448 | Rare earth element-doped multiple-core optical fiber, method for fabricating the same, and optical amplifier using the same | Kazuo Koya | 1996-10-29 |
| 5497445 | Polymer core optical wave-guide and fabrication method thereof | — | 1996-03-05 |
| 5475777 | Optical device with a pig tail optical fiber and its production method | Hiroyuki Hoshino | 1995-12-12 |
| 5206925 | Rare earth element-doped optical waveguide and process for producing the same | Masataka Nakazawa, Yasuo Kimura, Seiichi Kashimura, Toshikazu Kamoshida, Fujio Kikuchi | 1993-04-27 |
| 5190364 | Optical star coupler and method for manufacturing the same | Hiroyuki Kunugiyama | 1993-03-02 |
| 5140453 | Optical receiving method utilizing polarization diversity and apparatus for carrying out the same | Hideaki Tsushima, Hirohisa Sano, Akihiko Takase, Yoshitaka Takasaki, Minoru Maeda | 1992-08-18 |
| 5134672 | Optical waveguide type star coupler | Masataka Nakazawa, Yasuo Kimura | 1992-07-28 |
| 5111323 | Optical switching system | Toshiki Tanaka, Hiroshi Kuwahara, Taihei Suzuki | 1992-05-05 |
| 4970713 | Waveguide type optical multiplexer/demultiplexer with a wave guide regulating function | — | 1990-11-13 |
| 4953934 | Waveguide type light merging and branching device | Hirohisa Sano, Masaru Miyazaki, Naoyuki Matsuoka, Hisato Uetsuka | 1990-09-04 |
| 4909584 | Optical multi/demultiplexer and optical module using the same | Hirohisa Sano, Hideaki Tsushima | 1990-03-20 |
| 4904037 | Waveguide type optical device with thermal compensation layers | Hirohisa Sano, Yasuo Hira | 1990-02-27 |
| 4880289 | Two-way optical transmission system | Akihiko Takase, Atsushi Takai, Satoshi Aoki, Tsutomu Yoshiya, Shoji Yamada | 1989-11-14 |
| 4871221 | Optical waveguide device | — | 1989-10-03 |
| 4856859 | Optical waveguide and method for fabricating the same | — | 1989-08-15 |
| 4842359 | Optical star coupler and method of manufacturing the same | Minoru Maeda, Masayoshi Kameyama, Yasushi Ikuta, Hiroshi Araki, Shigeru Oho | 1989-06-27 |
| 4822128 | Optical fiber star coupler and method of manufacturing the same | Hirohisa Sano | 1989-04-18 |