Patents by Inventor David D. Beal

David D. Beal 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).

  • Trunking inter-switch links
    Patent number: 6819654
    Abstract: A method and apparatus for routing frames through a fiber channel fabric to make the most efficient possible use of redundant inter-switch links between neighboring switches. The inter-switch links may have different bandwidths. The flow between adjacent switches is monitored to determine various local usage statistics and periodically adjust routing tables to move data flows from congested links to lightly loaded links.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: November 16, 2004
    Assignee: McData Corporation
    Inventors: Stuart R. Soloway, Henry S. Yang, David D. Beal
  • Trunking inter-switch links
    Publication number: 20030165137
    Abstract: A method and apparatus for routing frames through a fibre channel fabric to make the most efficient possible use of redundant inter-switch links between neighboring switches. The inter-switch links may have different bandwidths. The flow between adjacent switches is monitored to determine various local usage statistics and periodically adjust routing tables to move data flows from congested links to lightly loaded links.
    Type: Application
    Filed: March 6, 2003
    Publication date: September 4, 2003
    Inventors: Stuart R. Soloway, Henry S. Yang, David D. Beal
  • Trunking inter-switch links
    Patent number: 6532212
    Abstract: A method and apparatus for routing frames through a fibre channel fabric to make the most efficient possible use of redundant inter-switch links between neighboring switches. The inter-switch links may have different bandwidths. The flow between adjacent switches is monitored to determine various local usage statistics and periodically adjust routing tables to move data flows from congested links to lightly loaded links.
    Type: Grant
    Filed: September 25, 2001
    Date of Patent: March 11, 2003
    Assignee: McData Corporation
    Inventors: Stuart R. Soloway, Henry S. Yang, David D. Beal
  • Fast parity checking in cache tag memory
    Patent number: 4483003
    Abstract: A parity checking arrangement for tag information in a cache memory. Parity generation is performed on the input tag in parallel with tag memory lookup and then compared with the parity stored in tag memory in order to speed operation. A single parity generator also may be used for writing into tag memory.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: November 13, 1984
    Assignee: AT&T Bell Laboratories
    Inventor: David D. Beal