Patents by Inventor Ernst Spirg

Ernst Spirg 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).

  • Temperature indicator
    Patent number: 4459046
    Abstract: A self-adhesive temperature indicator comprises a piece of transparent or translucent foil (10), one side being provided, over at least a region thereof, with a layer (12) of material which changes color at a predetermined temperature, over at least another region thereof with a printed layer (14), for example of a material having a visual characteristic (e.g. its own color) denoting the predetermined temperature, and over at least another region (preferably a peripheral margin) with a coating (18) of adhesive.
    Type: Grant
    Filed: January 27, 1982
    Date of Patent: July 10, 1984
    Inventor: Ernst Spirg