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经营范围
发明名称
Variable electric impedance
摘要
申请公布号
US2967945(A)
申请公布日期
1961.01.10
申请号
US19580773764
申请日期
1958.11.13
申请人
NORTH AMERICAN PHILIPS COMPANY, INC.
发明人
GIER NICO ARIE DE
分类号
H01C10/00;H01L31/08
主分类号
H01C10/00
代理机构
代理人
主权项
地址
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