Toshihide Tokunaga

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Kitaibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Polarized wave preserving fiber
- Patent number 4,818,047
- Issue date Apr 4, 1989
- Hitachi Cable Limited
- Yuuetsu Takuma
- G02 - OPTICS
Information Patent Grant
Single polarization optical fibers
- Patent number 4,610,506
- Issue date Sep 9, 1986
- Hitachi Cable, Ltd.
- Toshihide Tokunaga
- G02 - OPTICS
Information Patent Grant
Single polarization optical fibers
- Patent number 4,500,168
- Issue date Feb 19, 1985
- Hitachi Cable, Ltd.
- Hiroshi Kajioka
- G02 - OPTICS
Information Patent Grant
Single polarization optical fibers
- Patent number 4,493,530
- Issue date Jan 15, 1985
- Hitachi Cable, Ltd.
- Hiroshi Kajioka
- G02 - OPTICS