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发明名称
Crystal filter
摘要
申请公布号
US2227824(A)
申请公布日期
1941.01.07
申请号
US19380225097
申请日期
1938.08.16
申请人
RADIO CORPORATION
发明人
CROSBY MURRAY G.
分类号
H03H9/54
主分类号
H03H9/54
代理机构
代理人
主权项
地址
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