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发明名称
Photocell system
摘要
申请公布号
US2231621(A)
申请公布日期
1941.02.11
申请号
US19370177503
申请日期
1937.12.01
申请人
GOODRIDGE EDWARD S
发明人
GOODRIDGE EDWARD S.
分类号
G08B13/187
主分类号
G08B13/187
代理机构
代理人
主权项
地址
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