Telephonic communications – Having light wave or ultrasonic link for speech or paging... – Including fiber optic link within telephone network
Reexamination Certificate
2008-01-29
2008-01-29
Cumming, William D. (Department: 2617)
Telephonic communications
Having light wave or ultrasonic link for speech or paging...
Including fiber optic link within telephone network
C379S157000, C307S043000, C725S106000, C725S129000
Reexamination Certificate
active
11333635
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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