Patents by Inventor Jeffrey Daniel Hall

Jeffrey Daniel Hall 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).

  • Piezoelectric coating
    Patent number: 6878416
    Abstract: A color shifting composition and method useful as a coating on a surface. The composition comprises a layer of piezoelectric material disposed on the surface and a layer of electrically conductive disposed on the layer of piezoelectric material. A mechanism is included for changing an electromagnetic property of the layer of piezoelectric material. Thus, the surface has a first reflective or refractive property at one setting of the mechanism and another reflective or refractive property at another setting of the mechanism. In the illustrative embodiment, the layer of piezoelectric material and the layer of electrically conductive material are sufficiently thin to be transparent to electromagnetic energy in the frequencies of interest. In the illustrative embodiment, the mechanism for changing an electromagnetic property of the layer of piezoelectric material is a source of the electrical potential.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: April 12, 2005
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: Jeffrey Daniel Hall
  • Piezoelectric coating
    Publication number: 20040180133
    Abstract: A color shifting composition and method useful as a coating on a surface. The composition comprises a layer of piezoelectric material disposed on the surface and a layer of electrically conductive disposed on the layer of piezoelectric material. A mechanism is included for changing an electromagnetic property of the layer of piezoelectric material. Thus, the surface has a first reflective or refractive property at one setting of the mechanism and another reflective or refractive property at another setting of the mechanism. In the illustrative embodiment, the layer of piezoelectric material and the layer of electrically conductive material are sufficiently thin to be transparent to electromagnetic energy in the frequencies of interest. In the illustrative embodiment, the mechanism for changing an electromagnetic property of the layer of piezoelectric material is a source of the electrical potential.
    Type: Application
    Filed: March 14, 2003
    Publication date: September 16, 2004
    Inventor: Jeffrey Daniel Hall