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  • Publication Date: December 31, 1969
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Cited By (8)

    Publication numberPublication dateAssigneeTitle
    US-2894072-AJuly 07, 1959Bell Telephone Labor IncCentralized memory line concentrator system
    US-2916557-ADecember 08, 1959Bell Telephone Labor IncUniversal line concentrator
    US-2951907-ASeptember 06, 1960Charles C Marzin, Marc A Chappey, Pierre M LucasElectronic concentrator
    US-2962551-ANovember 29, 1960Bell Telephone Labor IncSwitching circuit
    US-2962555-ANovember 29, 1960Bell Telephone Labor IncLine concentrator system
    US-2966551-ADecember 27, 1960Antomatic Electric Lab IncPublic announcing system
    US-3106615-AOctober 08, 1963Automatic Elect LabCommunication switching system
    US-3121141-AFebruary 11, 1964Int Standard Electric CorpTelephonic systems