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发明名称
Electromechanical oscillator
摘要
申请公布号
US2739250(A)
申请公布日期
1956.03.20
申请号
US19540444300
申请日期
1954.07.19
申请人
GENERAL RAILWAY SIGNAL COMPANY
发明人
MARSH GARELD E.
分类号
G04C3/027;G04C13/06;H01H51/32
主分类号
G04C3/027
代理机构
代理人
主权项
地址
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