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发明名称
Light-responsive commutator or switchboard
摘要
申请公布号
US2189001(A)
申请公布日期
1940.02.06
申请号
US19370173726
申请日期
1937.11.09
申请人
PHOTOELECTRIC BUSINESS MACHINES, INC.
发明人
GOULD MERLE E.
分类号
主分类号
代理机构
代理人
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