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发明名称
Indicating device
摘要
申请公布号
US2128246(A)
申请公布日期
1938.08.30
申请号
US19370161809
申请日期
1937.08.31
申请人
HARDESTY GEORGE K C
发明人
HARDESTY GEORGE K. C.
分类号
F21V8/00;G02B6/00;G12B11/02
主分类号
F21V8/00
代理机构
代理人
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地址
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