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经营范围
发明名称
SOUND TRANSMISSION SYSTEM
摘要
申请公布号
CA334021(A)
申请公布日期
1933.07.18
申请号
CAD334021
申请日期
申请人
WILLIAM RUSHTON BOWKER
发明人
WILLIAM RUSHTON BOWKER
分类号
主分类号
代理机构
代理人
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