Patents by Inventor Joseph C. Harvell

Joseph C. Harvell 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).

  • Dynamic topology notification extensions for the domain name system
    Patent number: 6834302
    Abstract: A determination whether a network is connected to the Internet is made by configuring a first computer in the network to periodically generate a heartbeat message to a second computer outside the network. The second computer determines whether the heartbeat message is received, the receipt of which heartbeat message is indicative that the network is connected to the Internet.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: December 21, 2004
    Assignee: Nortel Networks Limited
    Inventor: Joseph C. Harvell