Patents by Inventor David Arthur Williams

David Arthur Williams 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: 7333350
    Abstract: There is disclosed a power conversion circuit comprising a transformer having a primary side driven by an input section and a secondary side connected to first and second self-driven synchronous rectifiers. A shutdown section includes a control section adapted to detect a predetermined condition and means for shorting a winding of the transformer upon detection of the predetermined condition.
    Type: Grant
    Filed: December 21, 2006
    Date of Patent: February 19, 2008
    Assignee: Power One, Inc.
    Inventors: David Arthur Williams, Donald R Caron, Ram Ramabhadran
  • Patent number: 7203041
    Abstract: There is disclosed a power conversion circuit including self synchronous rectifiers and a rapid shutdown section. When power is removed from the power conversion circuit, the rapid shutdown section prevents self oscillation of the self synchronous rectifiers. As a result, power is not drawn from the output and dissipated in the power conversion circuit.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: April 10, 2007
    Assignee: Power-One, Inc
    Inventors: David Arthur Williams, Donald R. Caron, Ram Ramabhadran
  • Patent number: 6535947
    Abstract: Methods, systems and computer program products are provided for segmenting a plurality of Universal Serial Bus (USB) devices connected to a common root hub into clusters. The devices may be segmented based on the connection topology. Such a segmentation may be performed without user intervention to define the clusters by designating a particular port(s) of USB hubs as expansion ports such that a USB hub connected to an expansion port starts a new cluster and may act as a cluster root hub. Devices connected to a cluster root hub may be considered in the same cluster if there is no intervening cluster root hub.
    Type: Grant
    Filed: May 30, 2000
    Date of Patent: March 18, 2003
    Assignee: International Business Machines Corporation
    Inventors: Sergio Amoni, Phuc Ky Do, Kumar Basalingappa Kori, Robert E. Russell, Jr., David Arthur Williams
  • Patent number: 3989858
    Abstract: A snack food product is made by frying in hot oil thin pieces of dough made from rusk crumbs, starch, water and, as desired, flavoring and emulsifying ingredients. The product is characterized by relatively dense surface layers and porous interiors.
    Type: Grant
    Filed: September 3, 1974
    Date of Patent: November 2, 1976
    Assignee: United Biscuits Limited
    Inventor: David Arthur Williams