Shigefumi Yamasaki

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Sakura, JP

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Patents Grantslast 30 patents

Information Patent Grant
Polarization-maintaining optical fiber and polarization-maintaining...
- Patent number 7,050,672
- Issue date May 23, 2006
- Fujikura Ltd.
- Ryokichi Matsumoto
- G02 - OPTICS
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
Multiple wavelength excitation optical multiplexing device, multipl...
- Patent number 6,459,829
- Issue date Oct 1, 2002
- Ryozo Yamauchi
- G02 - OPTICS
Information Patent Grant
Optical fiber grating and manufacturing method thereof
- Patent number 6,442,313
- Issue date Aug 27, 2002
- Fujikura Ltd.
- Ryozo Yamauchi
- G02 - OPTICS
Information Patent Grant
Optical fiber grating and manufacturing method therefor
- Patent number 6,298,183
- Issue date Oct 2, 2001
- Fujikura Ltd.
- Ryozo Yamauchi
- G02 - OPTICS
Information Patent Grant
Optical-fiber coupler and manufacturing process therefor
- Patent number 5,848,208
- Issue date Dec 8, 1998
- Fujikura Ltd.
- Fumio Suzuki
- G02 - OPTICS
Information Patent Grant
Polarized wave holding optical fiber, production method therefor, c...
- Patent number 5,689,578
- Issue date Nov 18, 1997
- Fujikura Ltd.
- Ryozo Yamauchi
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Optical fiber grating and manufacturing method thereof
- Publication number 20010019643
- Publication date Sep 6, 2001
- Ryozo Yamauchi
- G02 - OPTICS