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发明名称
Telephone or like system
摘要
申请公布号
US2383541(A)
申请公布日期
1945.08.28
申请号
US19430516322
申请日期
1943.12.31
申请人
AUTOMATIC ELECTRIC LABORATORIES INC.
发明人
GILLINGS CHARLES;BEALE CHARLES EDMUND
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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地址
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