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发明名称
Resonant sound signal device
摘要
申请公布号
US2678625(A)
申请公布日期
1954.05.18
申请号
US19510245882
申请日期
1951.09.10
申请人
ROBERT H. MORSE, JR.
发明人
HALL HARRY H.;TEICHMANN OTMAR E.
分类号
G10K5/00
主分类号
G10K5/00
代理机构
代理人
主权项
地址
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