Franciscus Johannes Maria Swinkels

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Thorn, NL

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Patents Applicationslast 30 patents

Information Patent Application
Percussion instrument with improved damping mechanism
- Publication number 20060180003
- Publication date Aug 17, 2006
- Franciscus Johannes Marie Swinkels
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Device for setting the tension of a skin of a musical instrument
- Publication number 20060137045
- Publication date Jun 22, 2006
- Franciscus Johannes Maria Swinkels
- G10 - MUSICAL INSTRUMENTS ACOUSTICS