Patents by Inventor Jens Gürtler

Jens Gürtler 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).

  • Key and lock device
    Patent number: 7099474
    Abstract: A key and lock device comprises a key having a first electronic circuit and a lock having a second electronic circuit. The key and the lock store secret information, some of which is unique for each device. The key and the lock exchange a random number through connectors and perform a calculation in the respective circuitry based on the random number and secret information. An electrical blocking mechanism is moved to a non-blocking position if a comparison of the calculations in the circuits gives the correct result.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: August 29, 2006
    Assignee: Assa Abby AB
    Inventors: Inge Lidén, Rolf Norberg, Björn Magnusson, Johan Warnström, Reijo Hakkarainen, Hannu Sivonen, Gudrun Brennecke, Christophe Chanel, Jens Gürtler, Jürgen Krühn, Alain Varenne, J M Thomas, Lance Schoell, Gilbert Andre, Christian Darmanin, Arnaud Lefebvre, Walter Hammer, Claude-Eric Jaquet, Nicolas Peguiron