Patents by Inventor Vijay Varadharajan

Vijay Varadharajan 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).

  • Communication system for portable appliances
    Patent number: 5887063
    Abstract: A portable device 12 is capable of communicating with a host device 10 remotely, via a communications network 22 which may be prone to interception, and directly (e.g. via an I.R. Link 24, 40), when the devices are in close physical proximity and when the risk of interception is minimal. The host device 10 and the portable device 12 update a shared security key or the like when they communicate directly and this key is used to authenticate the portable device 12 and/or encrypt the communication when the portable device 12 attempts to communicate remotely.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: March 23, 1999
    Assignee: Hewlett-Packard Company
    Inventors: Vijay Varadharajan, David George Dack