Masakatsu SAKAMOTO

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Hachiouji-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Nondirectional acoustic generator and speaker system
- Patent number 5,253,301
- Issue date Oct 12, 1993
- Kabushiki Kaisha Kenwood
- Masakatsu Sakamoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Speaker cone plate and method of forming
- Patent number 4,996,119
- Issue date Feb 26, 1991
- Kabushiki Kaisha Kenwood
- Yutaka Mae
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method for forming a hard carbon thin film on article and applicati...
- Patent number 4,772,513
- Issue date Sep 20, 1988
- Trio Kabushiki Kaisha
- Masakatsu Sakamoto
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Method for forming a hard carbon thin film on article and applicati...
- Patent number 4,725,345
- Issue date Feb 16, 1988
- Kabushiki Kaisha Kenwood
- Masakatsu Sakamoto
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Loudspeaker system
- Patent number 4,135,600
- Issue date Jan 23, 1979
- Trio Kabushiki Kaisha
- Kenji Ogi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Speaker system
- Patent number 4,126,204
- Issue date Nov 21, 1978
- Trio Kabushiki Kaisha
- Kenji Ogi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
SPEAKER UNIT
- Publication number 20090185711
- Publication date Jul 23, 2009
- KABUSHIKI KAISHA KENWOOD
- Akira SHIGETA
- H04 - ELECTRIC COMMUNICATION TECHNIQUE