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发明名称
ACOUSTIC DIAPHRAGM
摘要
申请公布号
US3508626(A)
申请公布日期
1970.04.28
申请号
USD3508626
申请日期
1967.12.22
申请人
FRANKLIN ROBBINS
发明人
FRANKLIN ROBBINS
分类号
H04R7/02;(IPC1-7):G01K13/00;H04R7/00
主分类号
H04R7/02
代理机构
代理人
主权项
地址
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