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经营范围
发明名称
MAGNETIC SYSTEM
摘要
申请公布号
US3593239(A)
申请公布日期
1971.07.13
申请号
USD3593239
申请日期
1969.02.24
申请人
U.S. PHILIPS CORP.
发明人
WYTZE HOFMAN
分类号
H01F7/02;H04R9/02;(IPC1-7):H01F7/00
主分类号
H01F7/02
代理机构
代理人
主权项
地址
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