Patents by Inventor David Hayward

David Hayward 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: 7333919
    Abstract: A method for detecting perturbation of a physical system from a reference state associated with a reference parameter (?0) to a perturbed state associated with a perturbed parameter (?) includes firstly deriving the reference parameter (?0). A reference vector (F) is then derived which describes the system's state at the reference parameter (?0). A measurement-related vector (Z) associated with a perturbed state of the system is then subtracted from the reference vector (F) to provide an error vector (E). The error vector members are summed and normalised by division of a summation of elements of a vector (F?) representing a derivative (f(?0??)e) of a reference itself represented by the reference vector (F), the derivative (f(?0??)e) being evaluated at the reference parameter (?0). This provides a result equal to the difference (??(?0) between the perturbed parameter (?) and the reference parameter (?0).
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: February 19, 2008
    Assignee: Qinetiq Limited
    Inventors: Stephen David Hayward, Timothy Ingram Cox, Marie Harper Anderson
  • Publication number: 20060119626
    Abstract: Aspects for maintaining and providing a calibrated color environment for display devices of a computer system. In an aspect of an exemplary method, the method includes determining relevant state data. The method further includes saving the relevant state data as calibration information for the calibrated color environment. The relevant state data includes information about a display that has an effect on color, such as a framebuffer driver state, a display driver state, and phospher characteristics of the display.
    Type: Application
    Filed: January 17, 2006
    Publication date: June 8, 2006
    Inventors: Ian Hendry, David Hayward, John Calhoun, Eric Anderson
  • Patent number: 7019758
    Abstract: Aspects for maintaining and providing a calibrated color environment for display devices of a computer system. In an aspect of an exemplary method, the method includes determining relevant state data, including a framebuffer driver state and a display driver state. The method further includes saving the relevant state data as calibration information for the calibrated color environment. The relevant state data includes information about a display that has an effect on color, such as a frame buffer driver state, a display driver state, and phospher characteristics of the display.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: March 28, 2006
    Assignee: Apple Computer, Inc.
    Inventors: Ian Hendry, David Hayward, John Calhoun, Eric Anderson
  • Patent number: 6699168
    Abstract: A bucket is capable of holding a sample container in a rotary centrifuge. The bucket has a receptacle to receive the sample container and a trunnion joined to the bucket. The trunnion has a plurality of cutouts that each define a flexible span that is sufficiently thin to flex under application of a centrifugal force generated by the rotary centrifuge, and pivot pins to that allows the bucket to pivot under the application of the centrifugal force. The receptacle has an open end having an internal surface with a tapering groove and a self-seating cap having pegs sized to fit in the tapering groove.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: March 2, 2004
    Assignee: Beckman Coulter, Inc.
    Inventors: David Hayward, Hanzel Lawas
  • Publication number: 20040004622
    Abstract: Aspects for maintaining and providing a calibrated color environment for display devices of a computer system. In an aspect of an exemplary method, the method includes determining relevant state data, including a framebuffer driver state and a display driver state. The method further includes saving the relevant state data as calibration information for the calibrated color environment. The relevant state data includes information about a display that has an effect on color, such as a frame buffer driver state, a display driver state, and phospher characteristics of the display.
    Type: Application
    Filed: April 16, 2003
    Publication date: January 8, 2004
    Inventors: Ian Hendry, David Hayward, John Calhoun, Eric Anderson
  • Patent number: 6587116
    Abstract: Aspects for maintaining and providing a calibrated color environment for display devices of a computer system. In an aspect of an exemplary method, the method includes determining relevant state data, including a framebuffer driver state and a display driver state. The method further includes saving the relevant state data as calibration information for the calibrated color environment. The relevant state data includes information about a display that has an effect on color, such as a framebuffer driver state, a display driver state, and phospher characteristics of the display.
    Type: Grant
    Filed: November 18, 1999
    Date of Patent: July 1, 2003
    Assignee: Apple Computer, Inc.
    Inventors: Ian Hendry, David Hayward, John Calhoun, Eric Anderson
  • Publication number: 20030119645
    Abstract: A bucket is capable of holding a sample container in a rotary centrifuge. The bucket has a receptacle to receive the sample container and a trunnion joined to the bucket. The trunnion has a plurality of cutouts that each define a flexible span that is sufficiently thin to flex under application of a centrifugal force generated by the rotary centrifuge, and pivot pins to that allows the bucket to pivot under the application of the centrifugal force. The receptacle has an open end having an internal surface with a tapering groove and a self-seating cap having pegs sized to fit in the tapering groove.
    Type: Application
    Filed: December 20, 2001
    Publication date: June 26, 2003
    Applicant: Beckman Coulter, Inc.
    Inventors: David Hayward, Hanzel Lawas
  • Patent number: 6279043
    Abstract: Aspects for utilizing functionality of an application program interface (API) of a computer system through script access to the API are described. A method aspect includes receiving a script of one or more desired events for manipulating a file, the file having a format, identifying whether a compatible format for the file is known by the API and executing the script on the file by the API when a compatible format is known.
    Type: Grant
    Filed: May 1, 1998
    Date of Patent: August 21, 2001
    Assignee: Apple Computer, Inc.
    Inventors: David Hayward, John Kennedy Calhoun, Steve Swen
  • Patent number: 6272649
    Abstract: Aspects for ensuring the integrity of a cache file utilized by an application program interface of a computer system are provided. A method aspect includes forming a checksum with a modification date value of each of a plurality of files, storing the checksum in the cache file, and utilizing the checksum to validate data in the cache file.
    Type: Grant
    Filed: September 28, 1998
    Date of Patent: August 7, 2001
    Assignee: Apple Computer, Inc.
    Inventors: David Hayward, John Kennedy Calhoun, Steve Swen
  • Patent number: 3952896
    Abstract: A hydraulic linkage for tractors and other vehicles in which loader arms are turnable upwardly and downwardly relative to a fixed frame part by first and second hydraulic rams. As seen in side elevation, the pivot axis of said arms and pivotal connections of the first ram(s) are at the corners of a triangle and a pivotal connection between the arms and apparatus coupled thereto and pivotal connections of the second ram(s) are at the corners of a second and separate triangle. The first and second rams are operatively interconnected in such a way that displacement of the piston of the first ram or rams causes hydraulic pressure medium to flow to the second ram or rams and effect piston displacement therein, or vice versa.
    Type: Grant
    Filed: November 27, 1974
    Date of Patent: April 27, 1976
    Inventor: John Albert David Hayward