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发明名称
Telephone circuit
摘要
申请公布号
US2293608(A)
申请公布日期
1942.08.18
申请号
US19410397038
申请日期
1941.06.07
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
发明人
KNITTLE GALE LEONARD;RANK PAUL JONES
分类号
H04M5/04
主分类号
H04M5/04
代理机构
代理人
主权项
地址
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