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发明名称
Toll ticketing telephone systems
摘要
申请公布号
US2908758(A)
申请公布日期
1959.10.13
申请号
US19520308957
申请日期
1952.09.11
申请人
GENERAL TELEPHONE LABORATORIES, INCORPORATED
发明人
PETERSON EDWARD S.
分类号
H04M15/38
主分类号
H04M15/38
代理机构
代理人
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