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经营范围
发明名称
Manufacture of quartz crystal assemblies
摘要
申请公布号
US2492357(A)
申请公布日期
1949.12.27
申请号
US19450620819
申请日期
1945.10.06
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
CHATTERJEA PRAFULLA KUMAR;POWERS STEPHEN JOHN
分类号
H03H9/10
主分类号
H03H9/10
代理机构
代理人
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