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经营范围
发明名称
BRUSH WEAR INDICATOR
摘要
申请公布号
US3609429(A)
申请公布日期
1971.09.28
申请号
USD3609429
申请日期
1970.02.02
申请人
HARRIS A. THOMPSON
发明人
HARRIS A. THOMPSON
分类号
G01R31/34;H01R39/58;(IPC1-7):H02K13/00
主分类号
G01R31/34
代理机构
代理人
主权项
地址
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