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发明名称
Telephone support
摘要
申请公布号
US2348138(A)
申请公布日期
1944.05.02
申请号
US19420453598
申请日期
1942.08.04
申请人
LATUS FLORENCE A;LEHRFELD WILLIAM H
发明人
LATUS FLORENCE A.;LEHRFELD WILLIAM H.
分类号
H04M1/05
主分类号
H04M1/05
代理机构
代理人
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地址
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