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发明名称
Sound reproducer
摘要
申请公布号
US2223496(A)
申请公布日期
1940.12.03
申请号
US19390290485
申请日期
1939.08.16
申请人
PRICE OSBORNE I
发明人
PRICE OSBORNE I.
分类号
H04R9/02;H04R9/06;H04R31/00
主分类号
H04R9/02
代理机构
代理人
主权项
地址
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