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发明名称
TELEPHONE TRANSMISSION SYSTEM
摘要
申请公布号
CA429112(A)
申请公布日期
1945.07.31
申请号
CAD429112
申请日期
申请人
AUTOMATIC ELECTRIC LABORATORIES;ASSOCIATED ELECTRIC LABORATORIES
发明人
ROSWELL, HARRY HERRICK
分类号
主分类号
代理机构
代理人
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