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发明名称
Frequency counter
摘要
申请公布号
US2416078(A)
申请公布日期
1947.02.18
申请号
US19430477990
申请日期
1943.03.04
申请人
HARTFORD NATIONAL BANK AND TRUST COMPANY
发明人
ZIEGLER MARC
分类号
G01R23/09
主分类号
G01R23/09
代理机构
代理人
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