Patents by Inventor Dominic M. R. Ashworth

Dominic M. R. Ashworth 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).

  • Multi-port network communication device with selective MAC address filtering
    Patent number: 7283525
    Abstract: A multi-port network communication device includes a plurality of ports for the reception and transmission of addressed data packets which include media access control address data, a forwarding mechanism for directing packets received at any of said plurality of ports to at least one of the plurality of ports, a memory for the selectively controllable storage of permitted media access control addresses, and means for restricting forwarding of packets from the device in response to an examination of media access control data in said packets and said permitted media access control addresses. The forwarding of a unicast packet having a source address and a destination address is prevented when neither of those addresses in the unicast packet corresponds to a permitted media access control address. The forwarding mechanism prevents the forwarding of multicast or broadcast packets to ports which are not connected to devices having permitted media access control addresses.
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: October 16, 2007
    Assignee: 3Com Corporation
    Inventors: Jon J Burgess, Graeme A Hickman, Shaun Paice, Dominic M. R. Ashworth, Paul R Garner
  • Multi-port network communication device with selective mac address filtering
    Publication number: 20010012296
    Abstract: A multi-port network communication device includes a plurality of ports for the reception and transmission of addressed data packets which include media access control address data, a forwarding mechanism for directing packets received at any of said plurality of ports to at least one of the plurality of ports, a memory for the selectively controllable storage of permitted media access control addresses, and means for restricting forwarding of packets from the device in response to an examination of media access control data in said packets and said permitted media access control addresses
    Type: Application
    Filed: January 17, 2001
    Publication date: August 9, 2001
    Inventors: Jon J. Burgess, Graeme A. Hickman, Shaun Paice, Dominic M.R. Ashworth, Paul R. Garner