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经营范围
发明名称
Improvements in and relating to electric signal apparatus
摘要
申请公布号
GB979718(A)
申请公布日期
1965.01.06
申请号
GB19610039009
申请日期
1961.10.31
申请人
PHILCO CORPORATION
发明人
分类号
G06K9/66;H03H15/00;H03H17/02;H03M1/00
主分类号
G06K9/66
代理机构
代理人
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