Patents by Inventor Patrick D. Hein

Patrick D. Hein 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).

  • Battery voltmeter
    Patent number: 5059895
    Abstract: The present invention discloses a battery voltmeter comprising:A) a dielectric layer;B) a conductive layer above or below one of the surfaces of the dielectric layer; andC) a temperature sensitive color indicator layer in thermal contact with the conductive layer,characterized in that the conductive layer has i) thermal insulating means under one of its surfaces and ii) sufficient heat generating capacity to affect a change in the temperature sensitive color indicator layer. The voltmeter can be intergrated into a label and attached directly to a battery.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: October 22, 1991
    Assignee: Eastman Kodak Company
    Inventors: Richard T. Cataldi, Patrick D. Hein, Henry J. Heirigs, John C. Leo