Inventor
COVIELLO FRANK A
3 patents
Patents
3 patentsUS4173714ANov 6, 1979
Communication circuit with combined power feed and data transmission over a phantom channel
TIE COMMUNICATIONS91 citations91
US4203011AMay 13, 1980
Computer controlled key telephone station set
TIE COMMUNICATIONS32 citations88
US4338495AJul 6, 1982
Electronic key telephone systems
TIE COMMUNICATIONS21 citations77