SOUTHWESTERN BELL TELEPHONE COMPANY
Patent Owner
Stats
- 4 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Oct 07, 2008 most recent publication
Details
- 4 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 1,210 Total Citation Count
- Mar 26, 1982 Earliest Filing
- 13 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
Rank in Class
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
Patent #
Title
Filing Date
Issue Date
Intl Class
7433412 Digital subscriber line induction neutralizing transformer networkJun 26, 07Oct 07, 08[H04B]
7167550 Apparatus and method for facilitating service management of communications services in a communications networkMay 13, 03Jan 23, 07[H04M]
6778651 Apparatus and method for facilitating service management of communications services in a communications networkFeb 13, 98Aug 17, 04[H04M]
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
7266154 Digital subscriber line induction neutralizing transformer networkExpiredMay 10, 02Sep 04, 07[H04B]
6852923 Device and method for imparting movement to a selected lineExpiredMay 03, 02Feb 08, 05[H02G]
5946372 Apparatus and method for testing digital communications circuitsExpiredApr 30, 97Aug 31, 99[H04M]
5943392 Device for measuring echo return loss in a two-two wire line systemExpiredJan 24, 97Aug 24, 99[H04M]
5920846 Method and system for processing a service request relating to installation, maintenance or repair of telecommunications services provided to a customer premisesExpiredFeb 27, 96Jul 06, 99[H04M, G06F]
5537464 Method and apparatus for the billing of value-added communication callsExpiredNov 02, 93Jul 16, 96[H04M]
4889977 Method of identifying the disposition of plug-in units at a warehouseExpiredDec 21, 87Dec 26, 89[G06F]
4685127 System for converting a No. 5 crossbar telephone switching central office to a conforming equal access central officeExpiredOct 01, 85Aug 04, 87[H04M, H04Q]
Top Inventors for This Owner
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