USPatentGranted

Method for interrupting a telephone call after receiving a busy signal

Granted 18 May 1999 · no office action yet

Current assignee: AT&T Services · originally AT&T Company

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Inventors: Thomas Michael Bauer, Walter C. Taylor, Elroy P. Cartwright · Examiner: Scott Wolinsky

Application
842131
filed 23 Apr 1997
Publication
Not published
not published
Patent· this page
US 5,905,788
granted 18 May 1999

Life of the patent

2 dated events
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Abstract

A telephone subscriber placing a telephone call through a telecommunications network (10) to a telephone line carrying an existing call may interrupt that call by entering an interrupt code to the network. Upon receipt of the code, the network verifies whether the interrupt code is valid by consulting a data base (21) that cross-references interrupt codes to corresponding lines. If the code is valid for the line carrying the existing call, the network then interrupts the existing call.

Claims

16 · 2 independent · depth 4
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16 granted claims

Classifications

5 codes
USPC · US Patent Classification
379/208379/204379/48379/218379/35

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File wrapper

Pendency
2.1 y
755 days filing → grant
Office actions
0
on the grant's record
Examiner
Scott Wolinsky
art unit —
Citations: 32 back · 1 forward

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