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经营范围
发明名称
Signal or musical instrument
摘要
申请公布号
US1994559(A)
申请公布日期
1935.03.19
申请号
US19320645966
申请日期
1932.12.06
申请人
BREWER
发明人
BERGERON LAWRENCE G.;BREWER ROBERT B.
分类号
G10K1/066
主分类号
G10K1/066
代理机构
代理人
主权项
地址
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