Tomonao Okubo

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Sound insulation/absorption structure, and structure having these a...
- Patent number 7,464,790
- Issue date Dec 16, 2008
- Rion Co., Ltd.
- Hidekazu Kodama
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Elastic wave control element using piezoelectric materials
- Patent number 6,548,936
- Issue date Apr 15, 2003
- Rion Co., Ltd.
- Hidekazu Kodama
- G10 - MUSICAL INSTRUMENTS ACOUSTICS

Patents Applicationslast 30 patents

Information Patent Application
Sound insulation/absorption structure, and structure having these a...
- Publication number 20060152108
- Publication date Jul 13, 2006
- Hidekazu Kodama
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Elastic wave control element using piezoelectric materials
- Publication number 20020021057
- Publication date Feb 21, 2002
- Rion Co., Ltd.
- Hidekazu Kodama
- G10 - MUSICAL INSTRUMENTS ACOUSTICS