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经营范围
发明名称
VARIABLE FREQUENCY CONTROL
摘要
申请公布号
US3644840(A)
申请公布日期
1972.02.22
申请号
USD3644840
申请日期
1970.05.28
申请人
LTV ELECTROSYSTEMS INC.
发明人
DAVID C. CONNER
分类号
H03L7/181;(IPC1-7):H03B3/04
主分类号
H03L7/181
代理机构
代理人
主权项
地址
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