Patents by Inventor S. Kamran Hasan

S. Kamran Hasan 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).

  • Call routing to wireless roamers in mobile telecommunication systems
    Patent number: 5724658
    Abstract: A method of serving a roaming subscriber in a telecommunication system having at least one wireless service carrier that can communicate with the roaming subscriber. A wired exchange carrier can communicate with the wireless service carrier and has access to a long distance trunk. A call destined for the roaming subscriber is received at the wired exchange carrier via the long distance trunk, and includes both a routing number corresponding to the roaming address of the roaming subscriber and a call routing parameter corresponding to the wireless service carrier. The call is selectively sent to the wireless service carrier in response to the call routing parameter, and a communication channel between the wireless service carrier and the roaming subscriber is then established in response to the routing number.
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: March 3, 1998
    Assignee: MCI Communications Corporation
    Inventor: S. Kamran Hasan