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发明名称
Telephone substation apparatus
摘要
申请公布号
US2019601(A)
申请公布日期
1935.11.05
申请号
US19350001837
申请日期
1935.01.15
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
EVANS WILLIAM A.
分类号
F16M11/10;H04M1/11
主分类号
F16M11/10
代理机构
代理人
主权项
地址
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