Patents by Inventor Zeeman Z. Zhang

Zeeman Z. Zhang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method and system for providing a continuous tone source using a network node
    Patent number: 7489769
    Abstract: A system and method for providing an on-hold call with a selectable continuous tone source using a service node, comprising a service switching point of a central office connected to a service logic program provisioned on a service node. Using the capabilities of the service node, the service logic program plays a continuous tone through a permanent trunk line connecting the service node to the service switching point. When the service switching point puts a call on hold, the service switching point connects the call through the permanent trunk line to the service logic program that is playing the continuous tone. As a result, the caller hears the continuous tone while the service switching point has the call on hold.
    Type: Grant
    Filed: June 4, 2003
    Date of Patent: February 10, 2009
    Inventors: Joseph M. Knoerle, Stephen R. Lapierre, Zeeman Z. Zhang
  • Method and system for providing a continuous tone source using a service node
    Publication number: 20030235283
    Abstract: A system and method for providing an on-hold call with a selectable continuous tone source using a service node, comprising a service switching point of a central office connected to a service logic program provisioned on a service node. Using the capabilities of the service node, the service logic program plays a continuous tone through a permanent trunk line connecting the service node to the service switching point. When the service switching point puts a call on hold, the service switching point connects the call through the permanent trunk line to the service logic program that is playing the continuous tone. As a result, the caller hears the continuous tone while the service switching point has the call on hold.
    Type: Application
    Filed: June 4, 2003
    Publication date: December 25, 2003
    Inventors: Joseph M. Knoerle, Stephen R. Lapierre, Zeeman Z. Zhang
  • Method and system for providing a continuous tone source using a service node
    Patent number: 6597780
    Abstract: A system and method for providing an on-hold call with a selectable continuous tone source using a service node, comprising a service switching point of a central office connected to a service logic program provisioned on a service node. Using the capabilities of the service node, the service logic program plays a continuous tone through a permanent trunk line connecting the service node to the service switching point. When the service switching point puts a call on hold, the service switching point connects the call through the permanent trunk line to the service logic program that is playing the continuous tone. As a result, the caller hears the continuous tone while the service switching point has the call on hold.
    Type: Grant
    Filed: December 16, 1999
    Date of Patent: July 22, 2003
    Assignee: BellSouth Intellectual Property Corporation
    Inventors: Joseph M. Knoerle, Stephen R. Lapierre, Zeeman Z. Zhang