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发明名称
A SYSTEM OF SOUND TRANSDUCERS WITH CONTROLLABLE DIRECTIONAL PROPERTIES
摘要
申请公布号
EP1317869(A1)
申请公布日期
2003.06.11
申请号
EP20010975031
申请日期
2001.09.12
申请人
VAN DER WERFF, JOHAN
发明人
VAN DER WERFF, JOHAN
分类号
H04R1/40;H04R3/12;(IPC1-7):H04R1/40
主分类号
H04R1/40
代理机构
代理人
主权项
地址
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