Nobutaka Watanabe

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Heating element device, heating element mounted structure, temperat...
- Patent number 6,911,627
- Issue date Jun 28, 2005
- NEC Corporation
- Takefumi Oguma
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Optical surge suppressing apparatus
- Patent number 6,373,610
- Issue date Apr 16, 2002
- NEC Corporation
- Tsukasa Takehana
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical receiving apparatus
- Patent number 6,008,919
- Issue date Dec 28, 1999
- NEC Corporation
- Nobutaka Watanabe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Modulating circuit for semiconductor optical modulator
- Patent number 5,732,097
- Issue date Mar 24, 1998
- NEC Corporation
- Masayuki Yamaguchi
- G02 - OPTICS
Information Patent Grant
Optical transmitter and receiver device with a single optical module
- Patent number 5,526,160
- Issue date Jun 11, 1996
- NEC Corporation
- Nobutaka Watanabe
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Photoelectric converter module
- Patent number 5,132,532
- Issue date Jul 21, 1992
- NEC Corporation
- Nobutaka Watanabe
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical isolator device having two cascaded isolator elements with...
- Patent number 4,756,607
- Issue date Jul 12, 1988
- NEC Corporation
- Nobutaka Watanabe
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Heating element device, heating element mounted structure, temperat...
- Publication number 20030230566
- Publication date Dec 18, 2003
- NEC Corporation
- Takefumi Oguma
- G02 - OPTICS
Information Patent Application
Heater for heating waveguide and waveguide with heater
- Publication number 20030127445
- Publication date Jul 10, 2003
- NEC Corporation
- Takefumi Oguma
- G02 - OPTICS