Arthur Perry Berkhoff

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The Hague, NL

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Patents Grantslast 30 patents

Information Patent Grant
Filter apparatus for actively reducing noise
- Patent number 8,144,888
- Issue date Mar 27, 2012
- Nederlandse Organisatie Voor Toegepastnatuurwetenschappelijk Onderzoek Tno
- Arthur Perry Berkhoff
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Device for actively reducing sound transmission, and panel comprisi...
- Patent number 7,530,426
- Issue date May 12, 2009
- Nederlandse Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek TNO
- Arthur Perry Berkhoff
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Noise reduction panel arrangement and method of calibrating such a...
- Patent number 6,959,092
- Issue date Oct 25, 2005
- Nederlandse Organisatie voor Toegepast-Natuurwetenschappelijk Onderzoek TNO
- Arthur Perry Berkhoff
- G10 - MUSICAL INSTRUMENTS ACOUSTICS

Patents Applicationslast 30 patents

Information Patent Application
FILTER APPARATUS FOR ACTIVELY REDUCING NOISE
- Publication number 20100150369
- Publication date Jun 17, 2010
- Arthur Perry Berkhoff
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Semimanufacture intended to be mounted on a vibrating wall or a vib...
- Publication number 20060250045
- Publication date Nov 9, 2006
- Marius Pieter de Goeje
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
Device for actively reducing sound transmission, and panel comprisi...
- Publication number 20060162264
- Publication date Jul 27, 2006
- Arthur Perry Berkhoff
- G10 - MUSICAL INSTRUMENTS ACOUSTICS