Yoshimasa Fujii

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Directional coupler for coupling single-polarization optical fibers
- Patent number 4,753,497
- Issue date Jun 28, 1988
- Hitachi Cable Limited
- Yoshimasa Fujii
- G02 - OPTICS
Information Patent Grant
Optical branching element
- Patent number 4,684,208
- Issue date Aug 4, 1987
- Sumitomo Metal Mining Company Limited
- Haruo Ishikawa
- G02 - OPTICS
Information Patent Grant
Optical wavelength demultiplexer
- Patent number 4,622,663
- Issue date Nov 11, 1986
- Sumitomo Metal Mining Company Limited
- Haruo Ishikawa
- G02 - OPTICS
Information Patent Grant
Polarization-maintaining fiber system and method of manufacturing t...
- Patent number 4,603,941
- Issue date Aug 5, 1986
- Agency of Industrial Science and Technology
- Yoshimasa Fujii
- G01 - MEASURING TESTING