Takaharu Ohyama

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical semiconductor device
- Patent number 8,916,946
- Issue date Dec 23, 2014
- Nippon Telegraph and Telephone Corporation
- Yoshiyuki Doi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical semiconductor device
- Patent number 8,704,322
- Issue date Apr 22, 2014
- Nippon Telegraph and Telephone Corporation
- Yoshiyuki Doi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical module
- Patent number 8,545,111
- Issue date Oct 1, 2013
- Nippon Telegraph and Telephone Corporation
- Takaharu Ohyama
- G02 - OPTICS
Information Patent Grant
Wave transmission medium and waveguide circuit
- Patent number 7,397,977
- Issue date Jul 8, 2008
- Nippon Telegraph and Telephone Corporation
- Toshikazu Hashimoto
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL SEMICONDUCTOR DEVICE
- Publication number 20140183677
- Publication date Jul 3, 2014
- NTT Electronics Corporation
- Yoshiyuki Doi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL SEMICONDUCTOR DEVICE
- Publication number 20120193740
- Publication date Aug 2, 2012
- NTT Electronics Corporation
- Yoshiyuki Doi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL MODULE
- Publication number 20100322569
- Publication date Dec 23, 2010
- Nippon Telegraph and Telephone Corporation
- Takaharu Ohyama
- G02 - OPTICS
Information Patent Application
OPTICAL SIGNAL MONITORING APPARATUS, OPTICAL SYSTEM AND OPTICAL SIG...
- Publication number 20080226290
- Publication date Sep 18, 2008
- Nippon Telegraph and Telephone Corporation
- Takaharu Ohyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Wave transmission medium and waveguide circuit
- Publication number 20060126992
- Publication date Jun 15, 2006
- Toshikazu Hashimoto
- G02 - OPTICS