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经营范围
发明名称
Signaling system
摘要
申请公布号
US2056722(A)
申请公布日期
1936.10.06
申请号
US19330703828
申请日期
1933.12.23
申请人
ASSOCIATED ELECTRIC LABORATORIES, INC.
发明人
HERSHEY HARRY E.
分类号
H04Q9/00
主分类号
H04Q9/00
代理机构
代理人
主权项
地址
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