Junichi Hayakawa

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Kawasaki-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical acoustoelectric transducer
- Patent number 7,391,976
- Issue date Jun 24, 2008
- Kabushiki Kaisha Kenwood
- Okihiro Kobayashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Cloth for loudspeaker diaphragm, loudspeaker diaphragm, and loudspe...
- Patent number 7,311,174
- Issue date Dec 25, 2007
- Kabushiki Kaisha Kenwood
- Junichi Hayakawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Loudspeaker diaphragm
- Patent number 6,863,153
- Issue date Mar 8, 2005
- Kabushiki Kaisha Kenwood
- Junichi Hayakawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Speaker system and its support legs
- Patent number 5,818,950
- Issue date Oct 6, 1998
- Kabushiki Kaisha Kenwood
- Yoshio Sakamoto
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Low sound loudspeaker system
- Patent number 5,197,103
- Issue date Mar 23, 1993
- Kabushiki Kaisha Kenwood
- Junichi Hayakawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Optical acoustoelectric transducer
- Publication number 20030002129
- Publication date Jan 2, 2003
- Okihiro Kobayashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Cloth for loudspeaker diaphragm, loudspeaker diaphragm, and loudspe...
- Publication number 20020160678
- Publication date Oct 31, 2002
- Junichi Hayakawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE