Roger Hsu

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Taipei, TW

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Patents Applicationslast 30 patents

Information Patent Application
PRACTICE MUTE FOR STRING INSTRUMENTS
- Publication number 20090007753
- Publication date Jan 8, 2009
- OTTO MUSICA CORPORATION
- Roger Hsu
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Sound box for floor-standing string instrument
- Publication number 20070113719
- Publication date May 24, 2007
- OTTO MUSICA CORPORATION
- Roger Hsu
- G10 - MUSICAL INSTRUMENTS ACOUSTICS