Interactive video distribution systems – Video distribution system with upstream communication – Transmission network
Reexamination Certificate
2006-03-07
2006-03-07
Cumming, William D. (Department: 2683)
Interactive video distribution systems
Video distribution system with upstream communication
Transmission network
C725S105000, C725S119000, C725S120000, C725S127000
Reexamination Certificate
active
07010803
ABSTRACT:
A hybrid coaxial cable network employing interdiction to ensure privacy in telephony communications. The video and telephony signals are secured such that telephony and interactive video signals to and from a subscriber do not appear on the network at any other undesired subscriber location.
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Brooks & Kushman P.C.
Cumming William D.
MediaOne Group Inc.
U S West, Inc.
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