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发明名称
MAGNETIC COMPOSITIONS
摘要
申请公布号
US3679379(A)
申请公布日期
1972.07.25
申请号
USD3679379
申请日期
1967.05.19
申请人
RCA CORP.
发明人
FUMIO OKAMOTO;YASUO WADA;KAZUO MIYATANI
分类号
H01F1/40;(IPC1-7):C01B19/00;H01B1/06;H01F1/00
主分类号
H01F1/40
代理机构
代理人
主权项
地址
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