Martinus P. M. Van De Thillart

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Eindhoven, NL

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Patents Grantslast 30 patents

Information Patent Grant
Sound-reproducing apparatus comprising an acoustic horn, and acoust...
- Patent number 5,737,435
- Issue date Apr 7, 1998
- U.S. Philips Corporation
- Gerrit F. M. De Poortere
- H04 - ELECTRIC COMMUNICATION TECHNIQUE