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经营范围
发明名称
Electric tachometer
摘要
申请公布号
US2774939(A)
申请公布日期
1956.12.18
申请号
US19550509305
申请日期
1955.05.18
申请人
ROCHESTER MANUFACTURING COMPANY, INC.
发明人
HASTINGS WARREN WALKER
分类号
G01P3/22
主分类号
G01P3/22
代理机构
代理人
主权项
地址
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