Patents by Inventor Yau-Fan Leung

Yau-Fan Leung 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: 6195546
    Abstract: Disclosed is an apparatus for initiating an over the air parameter administration (OTAPA) of a mobile station without the need for interacting with a mobile station user. A unique service option number included with the initial page indicates to the mobile station that an update is being requested. The mobile station performs a network validation check (SPASM) before permitting the update to take place. Flags are used in the network to alert the system that an attempted update was not completed because a mobile station was not update accessible for any of several reasons. The flags cause the system to update when the mobile station next becomes update accessible.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: February 27, 2001
    Assignee: Nortel Networks Limited
    Inventors: Yau-Fan Leung, Robert E. Denman, Kevin Wambsganz, Kim Chang
  • Patent number: RE39878
    Abstract: Disclosed is an apparatus for initiating an over the air parameter administration (OTAPA) of a mobile station without the need for interacting with a mobile station user. A unique service option number included with the initial page indicates to the mobile station that an update is being requested. The mobile station performs a network validation check (SPASM) before permitting the update to take place. Flags are used in the network to alert the system that an attempted update was not completed because a mobile station was not update accessible for any of several reasons. The flags cause the system to update when the mobile station next becomes update accessible. The questions raised in reexamination request No. 90/006,577, filed Mar. 25, 2003, have been considered and the results thereof are reflected in this reissue patent which constitutes the reexamination certificate required by 35 U.S.C. 307 as provided in 37 CFR 1.570(e).
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: October 9, 2007
    Assignee: Nortel Networks Limited
    Inventors: Athena (Yau-Fan) Leung, Robert E. Denman, Kevin Wambsganz, Kim Chang