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发明名称
Multioffice automatic telephone system
摘要
申请公布号
US1910405(A)
申请公布日期
1933.05.23
申请号
US19220599022
申请日期
1922.11.04
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
RAY ARTHUR J.
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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