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发明名称
PIEZOELECTRIC CRYSTAL APPARATUS
摘要
申请公布号
CA463248(A)
申请公布日期
1950.02.14
申请号
CAD463248
申请日期
申请人
BELL TELEPHONE LABORATORIES;WESTERN ELECTRIC COMPANY, INCORPORATED
发明人
WARREN P. MASON
分类号
主分类号
代理机构
代理人
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