Robert H. Van Ligten

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Zurich, CH

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Patents Grantslast 30 patents

Information Patent Grant
λ/4 absorber with an adjustable band width
- Patent number 6,167,985
- Issue date Jan 2, 2001
- Rieter Automotive (International) AG
- Robert Van Ligten
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Lambda/4-wave sound absorber
- Patent number 5,959,265
- Issue date Sep 28, 1999
- Rieter Automotive (International) AG
- Robert H. Van Ligten
- G10 - MUSICAL INSTRUMENTS ACOUSTICS