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发明名称
Alternating current demagnetizer
摘要
申请公布号
US2240749(A)
申请公布日期
1941.05.06
申请号
US19390302956
申请日期
1939.11.06
申请人
O. S. WALKER CO. INC.
发明人
BEECHLYN JOHN T.
分类号
H01F13/00
主分类号
H01F13/00
代理机构
代理人
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地址
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