Patents by Inventor Gerhard Murl

Gerhard Murl 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).

  • Printing ink for safe marking on a data carrier
    Patent number: 6379779
    Abstract: The application relates to a printing ink with an IR-absorbent additive to be applied for protection of documents and for machine detection. It is proposed that graphite be used as the IR-absorbent additive.
    Type: Grant
    Filed: August 10, 1999
    Date of Patent: April 30, 2002
    Assignee: Giesecke & Devrient GmbH
    Inventor: Gerhard Mürl
  • Numbering apparatus for documents, and numbered documents
    Patent number: 6164701
    Abstract: To improve the security in data carriers, such as papers of value, bank notes, ID cards, etc., a numbering apparatus is proposed for individualizing the data carrier whereby the characters are engraved in the engraved blocks present on the numbering apparatus such that the serial number extends along a line having a curvature.
    Type: Grant
    Filed: August 18, 1997
    Date of Patent: December 26, 2000
    Assignee: Diesecke & Devrient GmbH
    Inventor: Gerhard Murl