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发明名称
Telephone system
摘要
申请公布号
US1929422(A)
申请公布日期
1933.10.10
申请号
US19320623678
申请日期
1932.07.20
申请人
HAWKINS GEORGE C;POMEROY JOSEPH G;FIEDLER LIONEL R
发明人
HAWKINS GEORGE C.;POMEROY JOSEPH G.;FIEDLER LIONEL R.
分类号
H04M5/10
主分类号
H04M5/10
代理机构
代理人
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地址
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