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发明名称
Telephonic receiver
摘要
申请公布号
US1768630(A)
申请公布日期
1930.07.01
申请号
US19250009943
申请日期
1925.02.18
申请人
REICHMANN FRANK J
发明人
REICHMANN FRANK J.
分类号
H04R13/02
主分类号
H04R13/02
代理机构
代理人
主权项
地址
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