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经营范围
发明名称
Preselector system
摘要
申请公布号
US2106229(A)
申请公布日期
1938.01.25
申请号
US19360063295
申请日期
1936.02.11
申请人
JOHNSON LABORATORIES, INC.
发明人
SINNINGER DWIGHT V.
分类号
H03D7/18
主分类号
H03D7/18
代理机构
代理人
主权项
地址
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