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发明名称
Monitoring facility
摘要
申请公布号
US2257578(A)
申请公布日期
1941.09.30
申请号
US19400324275
申请日期
1940.03.16
申请人
INTERNATIONAL PROJECTOR CORPORATION
发明人
SHORTT EARL J.
分类号
H03F1/54;H04R27/00
主分类号
H03F1/54
代理机构
代理人
主权项
地址
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