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发明名称
Crystal holder
摘要
申请公布号
US2123236(A)
申请公布日期
1938.07.12
申请号
US19360075727
申请日期
1936.04.22
申请人
BELL TELEPHONE LABORATORIES, INCORPORATED
发明人
FAIR IRVIN E.
分类号
H03H3/04;H03H9/05;H03H9/09;H03H9/17;H03H9/19
主分类号
H03H3/04
代理机构
代理人
主权项
地址
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