Patents by Inventor Christain Huitema

Christain Huitema 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).

  • Publication number: 20020103898
    Abstract: Session Initiated Protocol (SIP) is used to communicate with Network-capable appliances by leveraging SIP capabilities to directly communicate with appliances, even when they are behind firewalls, Network Address Translators or other entities that prevent direct end-to-end communication. A remote user agent client (UAC) sends a message over the Internet via proxy servers to a user agent server at the location of the appliances, e.g., the client's home. This communications channel allows the client to control the appliances and to determine their status. In order to enable this operation, conventional SIP messages are extended to a DO message that includes a universal resource locator (URL) without location information otherwise specified in the SIP message and a generalized payload body with control and/or query instructions specific to networked appliances. When the command message is a SIP INVITE type, it includes a description of the appliance.
    Type: Application
    Filed: January 31, 2001
    Publication date: August 1, 2002
    Inventors: Stanley L. Moyer, David J. Marples, Simon Tsang, Christain Huitema