Patents by Inventor Robert L. Trope

Robert L. Trope 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).

  • Card having multiple layers indicating relative humidity
    Patent number: 6972142
    Abstract: A multi-layered card having a thin, flexible, non-moisture absorbable, printable first layer, a first high tack adhesive second layer on a back side of the first layer joining the first layer to a front face of a third layer of a moisture absorbable card stock. A back side of the card stock covered with a second high tack pressure sensitive adhesive fourth layer joining the card stock to a front face of a flexible magnet sheet fifth layer.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: December 6, 2005
    Inventor: Robert L. Trope
  • Card having multiple layers indicating relative humidity
    Publication number: 20040185207
    Abstract: A multi-layered card having a thin, flexible, non-moisture absorbable, printable first layer, a first high tack adhesive second layer on a back side of the first layer joining the first layer to a front face of a third layer of a moisture absorbable card stock. A back side of the card stock covered with a second high tack pressure sensitive adhesive fourth layer joining the card stock to a front face of a flexible magnet sheet fifth layer.
    Type: Application
    Filed: March 19, 2003
    Publication date: September 23, 2004
    Inventor: Robert L. Trope