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发明名称
CONFERENCE CALL CIRCUIT FOR USE IN A KEY TELEPHONE SYSTEM
摘要
申请公布号
CA1031478(A)
申请公布日期
1978.05.16
申请号
CA19750229312
申请日期
1975.06.13
申请人
TIE/COMMUNICATIONS, INC.;NIPPON TSU SHIN KOGYO K.K.
发明人
KERMAN, STEPHEN E.;SHINOI, TSUYOSHI;KATAOKA, TSUTOMU
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主分类号
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代理人
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