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发明名称
ELECTRET TRANSDUCER
摘要
申请公布号
EP1506556(B1)
申请公布日期
2007.07.18
申请号
EP20020727624
申请日期
2002.05.22
申请人
OLKKONEN, HANNU;HEIKKINEN, PAAVO
发明人
OLKKONEN, HANNU;HEIKKINEN, PAAVO
分类号
H01G7/02;H04R19/01
主分类号
H01G7/02
代理机构
代理人
主权项
地址
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