Patents by Inventor Karl M. Henson

Karl M. Henson 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).

  • Hub port without jitter transfer
    Patent number: 6064679
    Abstract: A hub port in a hub which preferably eliminates the transfer of jitter in the signal transmitted to an attached node port. In one implementation, jitter transfer is preferably eliminated by transmitting data to an attached node port using a local clock internal to the hub rather than a clock signal recovered from the datastream. The hub port includes smoothing circuits to synchronize data received from the attached node port to the local clock.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: May 16, 2000
    Assignee: Emulex Corporation
    Inventors: Hossein Hashemi, Karl M. Henson, David Brewer
  • Copy-back cache system having a plurality of context tags and setting all the context tags to a predetermined value for flushing operation thereof
    Patent number: 5146603
    Abstract: A data memory system includes a main memory and a copy-back cache. Each line of the cache has a context tag, which is compared with a current context number to test whether the line contains the required data. The cache can be flushed simply by resetting all the context tags to a null value, which ensures that the data cannot be accessed. However, it remains physically in the cache, and will eventually be copied back to the main memory when it is about to be overwritten with different data or when the physical address is next used.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: September 8, 1992
    Assignee: International Computers Limited
    Inventors: Adrian R. Frost, Karl M. Henson