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发明名称
Telephone system
摘要
申请公布号
US2269335(A)
申请公布日期
1942.01.06
申请号
US19410393156
申请日期
1941.05.13
申请人
AMERICAN TELEPHONE AND TELEGRAPH COMAPNY
发明人
CURLEY KIERAN JOSEPH
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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地址
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