Yuuetsu Takuma

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Hitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method of producing elliptic core type polarization-maintaining opt...
- Patent number 5,482,525
- Issue date Jan 9, 1996
- Hitachi Cable Limited
- Hiroshi Kajioka
- G02 - OPTICS
Information Patent Grant
Optical part including integral combination of optical fiber and li...
- Patent number 4,946,242
- Issue date Aug 7, 1990
- Hitachi, Ltd.
- Seikichi Tanno
- G02 - OPTICS
Information Patent Grant
Method of manufacturing polarization-maintaining optical fibers
- Patent number 4,859,223
- Issue date Aug 22, 1989
- Hitachi Cable Limited
- Hiroshi Kajioka
- C03 - GLASS MINERAL OR SLAG WOOL
Information Patent Grant
Polarized wave preserving fiber
- Patent number 4,818,047
- Issue date Apr 4, 1989
- Hitachi Cable Limited
- Yuuetsu Takuma
- G02 - OPTICS