Patents by Inventor Andrew John Patterson

Andrew John Patterson 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).

  • Patent number: 7677266
    Abstract: A manifolded fail-safe hydraulic control system provides fail-safe operation of a pipeline valve using no more than a total of 45 proprietary parts in the system. The system controls the operation of a spring return actuator, which in turn strokes the pipeline valve from the normal operating position to the fail-safe position, or from the fail-safe position to the normal operating position. The system enables the valve to automatically stroke to its fail-safe position without external power.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: March 16, 2010
    Inventor: Andrew John Patterson
  • Patent number: 6996711
    Abstract: A certificate validation mechanism is provided for a network interface. The certificate validation mechanism maintains a certificate cache containing local copies of certificates with associated validity indications. The certificate validation mechanism is operable to compare a certificate associated with a received message to the certificate cache and, where the certificate associated with the received message is held in the certificate cache, to associate with the message an indication of validity retrieved from the certificate cache. By providing a cache for certificates local to the network interface, the need always to verify a certificate by reference to a public repository is removed. If a certificate is not held in the local cache, then it can still be necessary to query the public repository. Nevertheless, the verification mechanism provides more immediate verification of certificate validity as this can be made locally without the cost and time of the remote verification at the public repository.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: February 7, 2006
    Assignee: Sun Microsystems, Inc.
    Inventors: Andrew John Patterson, Hilton Day, Nicola Cameron
  • Publication number: 20020143987
    Abstract: A method and system for routing messages comprising: converting a message received from a sender into an internal format comprising at least an attribute part and a data part, writing into said attribute part data extracted from said received message; and routing said converted message in dependence on the data in said attribute part.
    Type: Application
    Filed: August 21, 2001
    Publication date: October 3, 2002
    Inventors: Andrew Paul Sadler, Craig Phillip McMillan, Andrew John Patterson, David John Durbin
  • Publication number: 20020053023
    Abstract: A certificate validation mechanism is provided for a network interface. The certificate validation mechanism maintains a certificate cache containing local copies of certificates with associated validity indications. The certificate validation mechanism is operable to compare a certificate associated with a received message to the certificate cache and, where the certificate associated with the received message is held in the certificate cache, to associate with the message an indication of validity retrieved from the certificate cache. By providing a cache for certificates local to the network interface, the need always to verify a certificate by reference to a public repository is removed. If a certificate is not held in the local cache, then it can still be necessary to query the public repository. Nevertheless, the verification mechanism provides more immediate verification of certificate validity as this can be made locally without the cost and time of the remote verification at the public repository.
    Type: Application
    Filed: February 28, 2001
    Publication date: May 2, 2002
    Inventors: Andrew John Patterson, Hilton Day, Nicola Cameron