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发明名称
Frequency control system
摘要
申请公布号
US1994514(A)
申请公布日期
1935.03.19
申请号
US19300481706
申请日期
1930.09.13
申请人
HAMMOND JR JOHN HAYS
发明人
JR. JOHN HAYS HAMMOND,
分类号
H03L7/06;H04B1/30
主分类号
H03L7/06
代理机构
代理人
主权项
地址
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