Patents by Inventor Chun P. Tam

Chun P. Tam 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).

  • Patent number: 5012512
    Abstract: This invention relates to a method and apparatus for communication between an operator or agent position and a switching system and databases. The position includes a display screen and keyboard. Data for controlling a plurality of displays for the screen is stored in the switching system. In response to an operator's logging into the system, the position is connected to a plurality of databases by switched virtual channels, carried over the data channel of an ISDN connection from the position to the switch, and via switched virtual channels to the databases. A special section of the screen is devoted to parameters which are automatically transferred from one display to another whenever a new display is requested. When an operator wishes to set up a call, the call will be set up in accordance with the latest version of the parameters, whether or not the operator requests a display of a call control screen.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: April 30, 1991
    Assignee: AT&T Bell Laboratories
    Inventors: Richard J. Basso, Randall S. Hansen, Edward P. Kolasa, Mark L. Reynolds, Chun P. Tam
  • Patent number: 4776004
    Abstract: Apparatus and method are disclosed for providing a non-presubscription subaccount billing service utilized by customers on a "per call" or "as needed" basis. A calling customer initiates the service by dialing "0" plus the directory number of the called line. The local office serving the calling line recognizes the call as an operator-designated call and forwards the call along with the identification number of the calling line and the directory number of the called line to an operator system. The operator system prompts the calling line to enter additional call information. The calling customer enters a service activation code such as "15" and a two-digit subaccount billing number assigned by the customer. Receiving the service activation code and the subaccount billing number, the operator system activates the service by setting a subaccount billing indicator in an automatic message accounting record and extends the call to the called line.
    Type: Grant
    Filed: March 13, 1987
    Date of Patent: October 4, 1988
    Assignee: American Telephone and Telegraph Company, AT&T Bell Laboratories
    Inventors: Thomas M. Bauer, Thomas A. Dunn, Ross M. Richardson, Chun P. Tam