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发明名称
Polarized electromagnetic operator with damped coil armature
摘要
申请公布号
US2556816(A)
申请公布日期
1951.06.12
申请号
US19470721971
申请日期
1947.01.14
申请人
TECHNICON CARDIOGRAPH CORPORATION
发明人
LUKACS JOSEPH
分类号
H04R9/00
主分类号
H04R9/00
代理机构
代理人
主权项
地址
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