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发明名称
WAX GUARD FOR HEARING AIDS
摘要
申请公布号
CA769494(A)
申请公布日期
1967.10.17
申请号
CAD769494
申请日期
申请人
DAHLBERG ELECTRONICS
发明人
RICHARD T. MARTIN
分类号
主分类号
代理机构
代理人
主权项
地址
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