U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Call processing control system

Patent 5333133 Issued on July 26, 1994. Estimated Expiration Date: Icon_subject April 28, 2012. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Method of and apparatus for voice communication storage and forwarding with simultaneous access to multiple users
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Issued on: 02/25/1986
Inventor: Szeto

Apparatus for controlling digital voice recording and playback over telephone lines and adapted for use with standard host computers
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Terminal based adjunct call manager for a communication system
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Automated telephone operator overflow device
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Voice-switched gain control for voice communication equipment connected to telephone lines
Patent #: 4980908
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Inventor: Yu

Method and apparatus for storing and forwarding voice signals with controlled access
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Interactive call distribution processor
Patent #: 5020095
Issued on: 05/28/1991
Inventor: Morganstein, et al.

Automated call handling apparatus
Patent #: 5023868
Issued on: 06/11/1991
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Switchless automatic call distribution system
Patent #: 5036535
Issued on: 07/30/1991
Inventor: Gechter, et al.

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Inventors

Assignee

Application

No. 875069 filed on 04/28/1992

US Classes:

370/261, Technique for setting up a conference call370/259, SPECIAL SERVICES370/463, Details of circuit or interface for connecting user to the network379/88.24, By generated tone379/158, Conferencing379/211.01, Call diversion (e.g., call capture)379/212.01Call transfer

Examiners

Primary: Chin, Wellington
Assistant: Nguyen, Chau

Attorney, Agent or Firm

International Classes

H04M 003/56
H04L 005/18

Abstract

A control system for processing calls comprising a call handling device and a device controller that are each connected to a network via a call connection interface that permits establishing and releasing a network connection, participation with another call connection interface in the same network connection, and either control over a network connection when the interface is the sole interface participating in that connection or control over a network connection to drop the last leg added to a network connection, the device controller and call handling device sending messages to each other over a message transfer interface. Also disclosed are a system for shifting control of a network connection and a system for monitoring the state of a network connection from a network interface that is not actively engaged in the network connection.

Other References

  • Luhmann, Rick, "IVR Trends", Interactive Voice Response, Teleconnect, Sep. 1991, pp. 106, 108-11
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