Hiroshi Hidaka

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Yotsukaidoh, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of manufacturing polarization-maintaining optical fiber coupler
- Patent number 6,463,195
- Issue date Oct 8, 2002
- Fujikura Ltd.
- Hideki Sasaki
- G02 - OPTICS
Information Patent Grant
Method of making an optical waveguide grating with two dissimilar i...
- Patent number 5,996,375
- Issue date Dec 7, 1999
- Michihiro Nakai
- G02 - OPTICS
Information Patent Grant
Optical waveguide grating and production method therefor
- Patent number 5,949,934
- Issue date Sep 7, 1999
- Fujikura, Ltd.
- Kensuke Shima
- G02 - OPTICS
Information Patent Grant
Optical filter with planar optical waveguide having periodically va...
- Patent number 5,930,437
- Issue date Jul 27, 1999
- Fujikura Ltd.
- Michihiro Nakai
- G02 - OPTICS