Patents by Inventor David H. Gray

David H. Gray 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: 6122846
    Abstract: An apparatus and method of operation for measuring forces applied to a wearer's foot, the apparatus providing an indication to the wearer when forces on the foot exceed pre-selected upper limits or do not meet pre-selected lower limits. A body member is disclosed for attachment around the wearer's foot, the body member having an exterior sole and an interior sole portion covered by a rigid foot plate. The foot plate includes an upper support surface for contact with the foot. The interior sole portion includes at least one cavity within, with a force sensing unit attachable partially within the cavity. At least one strain gage is positioned at a midpoint on the force sensing unit, and the force sensing unit is connectable to the underside of the foot plate. An electronic means is mounted within the cavity and is electrically connected to the at least one strain gage.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: September 26, 2000
    Assignee: Frank B. Gray
    Inventors: Frank B. Gray, John L. Parris, David H. Gray, Raimer G. Riffert
  • Patent number: 5849215
    Abstract: A method for synthesizing composites with architectural control on the nanometer scale is described. A polymerizable lyotropic liquid-crystalline monomer is used to form an inverse hexagonal phase in the presence of a second polymer precursor solution. The monomer system acts as an organic template, providing the underlying matrix and order of the composite system. Polymerization of the template in the presence of an optional cross-linking agent with retention of the liquid-crystalline order is carried out followed by a second polymerization of the second polymer precursor within the channels of the polymer template to provide an ordered nanocomposite material.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: December 15, 1998
    Assignee: The Regents of the University of California
    Inventors: Douglas L. Gin, Walter M. Fischer, David H. Gray, Ryan C. Smith