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经营范围
发明名称
Electrical indicating, measuring, relay and like arrangements responsive to frequency
摘要
申请公布号
US1872243(A)
申请公布日期
1932.08.16
申请号
US19290406869
申请日期
1929.11.13
申请人
WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY
发明人
CHURCHER BRIAN ANDREW GRAHAM
分类号
G01R23/02
主分类号
G01R23/02
代理机构
代理人
主权项
地址
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