Patents by Inventor Gerrit Hackl

Gerrit Hackl 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).

  • Security element for the identification of a security document using liquid crystal display driven with piezoelectric energy source and method for producing it
    Patent number: 8896501
    Abstract: The invention relates to a security element for the identification of a security document, in particular a banknote, a valuable paper or a paper document, comprising at least one electrically controllable display element and at least one piezoelectric energy source which controls the at least one display element. The security element is formed by a flexible multilayered film body comprising the at least one electrically controllable display element containing a display layer having liquid crystals that can be oriented in an electric field, and comprising the at least one piezoelectric energy source which controls the at least one display element and has at least one layer composed of piezoelectric material, wherein the security element has a thickness of at most 70 ?m in a direction perpendicular to the plane of the film body.
    Type: Grant
    Filed: September 16, 2008
    Date of Patent: November 25, 2014
    Assignee: Poly IC GmbH & Co. KG
    Inventors: Rainer Stahl, Gerrit Hackl, Steffen Weiss, Klaus Ludwig, Johannes Schad
  • SECURITY ELEMENT FOR THE IDENTIFICATION OF A SECURITY DOCUMENT AND METHOD FOR PRODUCING IT
    Publication number: 20100277441
    Abstract: The invention relates to a security element for the identification of a security document, in particular a banknote, a valuable paper or a paper document, comprising at least one electrically controllable display element and at least one piezoelectric energy source which controls the at least one display element. The security element is formed by a flexible multilayered film body comprising the at least one electrically controllable display element containing a display layer having liquid crystals that can be oriented in an electric field, and comprising the at least one piezoelectric energy source which controls the at least one display element and has at least one layer composed of piezoelectric material, wherein the security element has a thickness of at most 70 ?m in a direction perpendicular to the plane of the film body.
    Type: Application
    Filed: September 16, 2008
    Publication date: November 4, 2010
    Applicants: POLYIC GMBH & CO. KG, LEONHARD KURZ STIFTUNG & CO. KG
    Inventors: Rainer Stahl, Gerrit Hackl, Steffen Weiss, Klaus Ludwig, Johannes Schad