Patents by Inventor Erhard Klinkhardt

Erhard Klinkhardt 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).

  • Arrangement for activating and/or deactivating a marker strip having a magnetizable layer
    Patent number: 4575624
    Abstract: A portable device for deactivating and/or activating a magnetizable layer forming part of a marker strip of an antishoplifting system. The device includes an electro-optical reading head for reading specially coded indicia on the marker strip and an A.C. current electro-magnetic coil for producing a magnetic field to deactivate or activate the magnetizable layer of the marker strip. The electro-optical reading head and electro-magnetic coil are mounted in a common portable housing and are connected to a cashier's register.
    Type: Grant
    Filed: November 30, 1983
    Date of Patent: March 11, 1986
    Assignee: Rheinmetall GmbH
    Inventor: Erhard Klinkhardt