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经营范围
发明名称
CRYSTAL FILTER
摘要
申请公布号
CA859300(A)
申请公布日期
1970.12.22
申请号
CAD859300
申请日期
申请人
WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
WILLIAM D. BEAVER;ROGER A. SYKES
分类号
主分类号
代理机构
代理人
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