Naoto Yoshimoto

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Yokosuka-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical coupling/splitting device, two-way optical propagation devi...
- Patent number 9,306,670
- Issue date Apr 5, 2016
- Nippon Telegraph and Telephone Corporation
- Masamichi Fujiwara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Self-diagnostic method for PON protection system, and PON protectio...
- Patent number 9,276,670
- Issue date Mar 1, 2016
- Nippon Telegraoh and Telephone Corporation
- Youichi Fukada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical network system
- Patent number 9,179,204
- Issue date Nov 3, 2015
- Nippon Telegraph and Telephone Corporation
- Takashi Mitsui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical communication light source unit and wavelength monitoring c...
- Patent number 7,869,717
- Issue date Jan 11, 2011
- Nippon Telegraph and Telephone Corporation
- Shingo Kawai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical module and method for monitoring and controlling wavelengths
- Patent number 7,460,572
- Issue date Dec 2, 2008
- Nippon Telegraph and Telephone Corporation
- Shingo Kawai
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
SELF-DIAGNOSTIC METHOD FOR PON PROTECTION SYSTEM, AND PON PROTECTIO...
- Publication number 20150003822
- Publication date Jan 1, 2015
- Nippon Telegraph and Telephone Corporation
- Youichi Fukada
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OPTICAL NETWORK SYSTEM
- Publication number 20140219654
- Publication date Aug 7, 2014
- Nippon Telegraph and Telephone Corporation
- Takashi Mitsui
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
LIGHT MERGING/BRANCHING DEVICE, BIDIRECTIONAL LIGHT PROPAGATION DEV...
- Publication number 20140186040
- Publication date Jul 3, 2014
- Masamichi Fujiwara
- G02 - OPTICS
Information Patent Application
Optical Communication Light Source Unit and Wavelength Monitoring C...
- Publication number 20090161708
- Publication date Jun 25, 2009
- Nippon Telegraph and Telephone Corporation
- Shingo Kawai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Optical module and its wavelength monitor control method
- Publication number 20060145051
- Publication date Jul 6, 2006
- Shingo Kawai
- H01 - BASIC ELECTRIC ELEMENTS