Patents by Inventor David W. Davenport

David W. Davenport 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).

  • Methods and apparatus for routing packets in packet transmission networks
    Patent number: 5309433
    Abstract: A packet communications system provides for point-to-point packet routing and multicast packet routing to limited subsets of nodes in the network, using a routing field in the packet header which is processed according to two different protocols. A third protocol is provided in which a packet can be multicast to the limited subset even when launched from a node which is not a member of the subset. The routing field includes a first portion which contains the route labels necessary to deliver the packet to the multicast subset. A second portion of the routing field contains the multicast subset identifier which can then be used to deliver the packet to all of the members of the multicast subset. Provision is made to backtrack deliver the packet to the last node identified before the multicast subset if that last node is itself a member of the subset.
    Type: Grant
    Filed: June 18, 1992
    Date of Patent: May 3, 1994
    Assignee: International Business Machines Corp.
    Inventors: Israel Cidon, David W. Davenport, Jeffrey H. Derby, John G. Dudley, Inder S. Gopal, James P. Janniello, Marc A. Kaplan, Francis R. Koperda, Shay Kutten, Kenneth H. Potter, Jr.