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经营范围
发明名称
ACOUSTIC TRANSDUCER
摘要
申请公布号
GB8333717(D0)
申请公布日期
1984.01.25
申请号
GB19830033717
申请日期
1983.12.19
申请人
LECTRET SA
发明人
分类号
H01L41/45;H04R19/00;H04R31/00;(IPC1-7):H04R/
主分类号
H01L41/45
代理机构
代理人
主权项
地址
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