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经营范围
发明名称
Bone conduction receiver
摘要
申请公布号
US2339173(A)
申请公布日期
1944.01.11
申请号
US19400361140
申请日期
1940.10.14
申请人
SONOTONE CORPORATION
发明人
KOREN HEIMAN W.
分类号
B23B13/02;H04R17/00
主分类号
B23B13/02
代理机构
代理人
主权项
地址
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