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发明名称
TELEPHONE ANSWERING SYSTEM
摘要
申请公布号
US3571518(A)
申请公布日期
1971.03.16
申请号
USD3571518
申请日期
1968.08.13
申请人
BELL TELEPHONE LABORATORIES INC.;WESTERN ELECTRIC CO. INC.
发明人
ELMER O. CHIPMAN;ROBERT J. MCCARROLL;SEYMOUR B. WEINBERG
分类号
H04M3/60;H04Q3/00;(IPC1-7):H04M5/06
主分类号
H04M3/60
代理机构
代理人
主权项
地址
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