U.S. Sprint Communications Company Limited
Patent Owner
Stats
- 0 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Nov 29, 1994 most recent publication
Details
- 0 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 519 Total Citation Count
- Jun 04, 1985 Earliest Filing
- 9 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
- No Technology to Display
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
- No Recent Patents to Display
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5369685 Voice-activated telephone directory and call placement systemExpiredMar 07, 91Nov 29, 94[H04M]
5274695 System for verifying the identity of a caller in a telecommunications networkExpiredJan 11, 91Dec 28, 93[H04M]
4972464 System for placement of a long distance telephone carrier point-of-presence and call routingExpiredNov 01, 89Nov 20, 90[H04M]
4713810 Diagnostic technique for determining fault locations within a digital transmission systemExpiredSep 19, 85Dec 15, 87[H04L, G06F]
4710924 Local and remote bit error rate monitoring for early warning of fault location of digital transmission systemExpiredSep 19, 85Dec 01, 87[H04L, G06F]
4667319 Digital repeater with 3-way branching of service channelsExpiredJul 29, 85May 19, 87[H04B, H04J]
4652861 Method and apparatus for protecting buried optical fiber cableExpiredJun 04, 85Mar 24, 87[G08B]
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