Toshifumi Hasama

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Tsukuba, JP

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Patents Grantslast 30 patents

Information Patent Grant
Wavelength domain optical switch
- Patent number 8,503,836
- Issue date Aug 6, 2013
- National Institute of Advanced Industrial Science and Technology
- Hiroshi Ishikawa
- G02 - OPTICS
Information Patent Grant
Optical waveguide-type wavelength domain switch
- Patent number 8,229,258
- Issue date Jul 24, 2012
- National Institute of Advanced Industrial Science and Technology
- Hiroshi Ishikawa
- G02 - OPTICS
Information Patent Grant
Waveguide type wavelength domain optical switch
- Patent number 7,567,736
- Issue date Jul 28, 2009
- National Institute of Advanced Industrial Science and Technology
- Hiroshi Ishikawa
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
WAVELENGTH CROSS CONNECT DEVICE
- Publication number 20130272650
- Publication date Oct 17, 2013
- NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
- Hiroshi Ishikawa
- G02 - OPTICS
Information Patent Application
WAVELENGTH DOMAIN OPTICAL SWITCH
- Publication number 20110182545
- Publication date Jul 28, 2011
- NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
- Hiroshi Ishikawa
- G02 - OPTICS
Information Patent Application
Optical waveguide-type wavelength domain switch
- Publication number 20100067900
- Publication date Mar 18, 2010
- NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
- Hiroshi Ishikawa
- G02 - OPTICS
Information Patent Application
Waveguide type wavelength domain optical switch
- Publication number 20080298738
- Publication date Dec 4, 2008
- NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
- Hiroshi Ishikawa
- G02 - OPTICS