Patents by Inventor Leslie A. Walker

Leslie A. Walker 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).

  • Assay device
    Patent number: 7718443
    Abstract: Disclosed is an assay device to determine the presence of at least one analyte of interest in a liquid sample, the device comprising means for generating a first signal (the ‘test’ signal) which indicates the presence and/or amount of analyte of interest in the sample; and means for generating a second signal, the generation of which second signal indicates both (a) the test has been successfully conducted, and that (b) sufficient time has elapsed following contact of the assay device with the liquid sample for the test to be read and the first signal to have been properly generated.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: May 18, 2010
    Assignee: Inverness Medical Switzerland GmbH
    Inventors: Natalie Elizabeth Beesley, Barry Sinclair Brewster, Susan Catrin Day, Adrian Leslie Walker
  • Methods for stable transformation of wheat
    Patent number: 5955362
    Abstract: The present invention is drawn to the production of fertile transformed wheat plants. The method involved subjecting wheat tissues to high velocity microprojectile bombardment, selecting for transformed cells, and regenerating stably transformed fertile plants from the transformed cells.
    Type: Grant
    Filed: March 6, 1997
    Date of Patent: September 21, 1999
    Assignee: Novartis Finance Corporation
    Inventors: Yin-Fu Chang, James Richard Wong, Andrea Itano, Stephen J. Mejza, Leslie Walker
  • Methods for stable transformation of wheat
    Patent number: 5610042
    Abstract: The present invention is drawn to the production of fertile transformed wheat plants. The method involved subjecting wheat tissues to high velocity microprojectile bombardment, selecting for transformed cells, and regenerating stably transformed fertile plants from the transformed cells.
    Type: Grant
    Filed: November 1, 1993
    Date of Patent: March 11, 1997
    Assignee: Ciba-Geigy Corporation
    Inventors: Yin-Fu Chang, James R. Wong, Andrea Itano, Stephen J. Mejza, Leslie Walker
  • Thread frame for forming a pattern
    Patent number: 5435048
    Abstract: An apparatus for forming a pattern utilizing a line which interacts with a frame member. The frame member includes at least a first portion and a second portion spaced from each other. First and second collar elements are rotatably attached to the first and second portions of the frame member. Each of the first and second collar elements possess a plurality of flexible fingers, each finger being capable of releasably holding the line. The frame members may be straight, angulated, or curved as desired.
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: July 25, 1995
    Inventor: Leslie A. Walker