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发明名称
Telephone testing system
摘要
申请公布号
US1855852(A)
申请公布日期
1932.04.26
申请号
US19300452065
申请日期
1930.05.13
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
FREESLAND WILSON S.
分类号
H04M3/30
主分类号
H04M3/30
代理机构
代理人
主权项
地址
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