Kazuyuki Yokoyama

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Mizusawa-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Antenna duplexer and wireless terminal using the same
- Patent number 7,659,795
- Issue date Feb 9, 2010
- Hitachi, Ltd.
- Mitsutaka Hikita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Radio frequency filter, radio frequency circuit, antenna duplexer a...
- Patent number 6,714,099
- Issue date Mar 30, 2004
- Hitachi Media Electronics Co., Ltd.
- Mitsutaka Hikita
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
Antenna duplexer and wireless terminal using the same
- Publication number 20080272854
- Publication date Nov 6, 2008
- Hitachi Media Electronics Co., Ltd.
- Mitsutaka Hikita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Antenna duplexer and wireless terminal using the same
- Publication number 20070030095
- Publication date Feb 8, 2007
- Mitsutaka Hikita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Radio frequency fliter, radio frequency circuit, antenna duplexer a...
- Publication number 20020140520
- Publication date Oct 3, 2002
- HITACHI MEDIA ELECTRONICS CO., LTD.
- Mitsutaka Hikita
- H03 - BASIC ELECTRONIC CIRCUITRY