Takafumi Kai

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Band-pass filter comprised of a dielectric substrate having a pair...
- Patent number 9,793,589
- Issue date Oct 17, 2017
- NEC Corporation
- Takafumi Kai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Coaxial waveguide converter and ridge waveguide
- Patent number 9,118,098
- Issue date Aug 25, 2015
- NEC Corporation
- Takafumi Kai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Multi-resonator waveguide bandpass filter
- Patent number 8,988,171
- Issue date Mar 24, 2015
- NEC Corporation
- Takafumi Kai
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
BAND-PASS FILTER
- Publication number 20150137911
- Publication date May 21, 2015
- NEC Corporation
- Takafumi Kai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
COAXIAL WAVEGUIDE CONVERTER AND RIDGE WAVEGUIDE
- Publication number 20130271235
- Publication date Oct 17, 2013
- NEC Corporation
- Takafumi Kai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
BANDPASS FILTER
- Publication number 20110241795
- Publication date Oct 6, 2011
- Takafumi Kai
- H01 - BASIC ELECTRIC ELEMENTS