Patents by Inventor Yuan-Cheng Lan

Yuan-Cheng Lan 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).

  • System and method for providing status notification for conventional telephony devices in a session initiation protocol environment
    Publication number: 20070201459
    Abstract: The present invention comprises a system and method for status notification. The method comprises receiving a subscription message from a first endpoint requesting status data for a second endpoint; detecting a change in status data of the second endpoint; and notifying the first endpoint of the change in status. The subscription message comprises a resource identifier associated with the second endpoint.
    Type: Application
    Filed: February 27, 2006
    Publication date: August 30, 2007
    Inventors: Ho Bao, Denise Caballero-McCann, Ta-Ming Chen, Yuan-Cheng Lan, Christopher Pearce, Kannan Rajagopalan