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经营范围
发明名称
Sound reproducing system
摘要
申请公布号
US2242197(A)
申请公布日期
1941.05.13
申请号
US19390255884
申请日期
1939.02.11
申请人
JESSE T. WEST
发明人
WEST BERNARD G.;WEST LEONARD A.;POUNDS RICHARD T.
分类号
G07F17/30
主分类号
G07F17/30
代理机构
代理人
主权项
地址
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