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发明名称
Electrical signaling system
摘要
申请公布号
US2292978(A)
申请公布日期
1942.08.11
申请号
US19400366044
申请日期
1940.11.18
申请人
ASSOCIATED TELEPHONE & TELEGRAPH COMPANY
发明人
THOMAS JOHN HENRY RICHARD;SAVILLE WILLIE
分类号
G08B27/00
主分类号
G08B27/00
代理机构
代理人
主权项
地址
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