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发明名称
Telephone receiver attachment
摘要
申请公布号
US2843680(A)
申请公布日期
1958.07.15
申请号
US19560593951
申请日期
1956.06.26
申请人
POLLARD MARVIN F
发明人
POLLARD MARVIN F.
分类号
H04M1/05
主分类号
H04M1/05
代理机构
代理人
主权项
地址
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