Patents by Inventor Lothar Schütt

Lothar Schütt 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).

  • Patent number: 9171411
    Abstract: A method for the compensation of disturbances upon magnetic measurements on value documents, in which a sensor having several measuring tracks for generating measurement signals is employed, in which for each value document a specified number of data records is generated, the value document not being captured by at least one of the measuring tracks during the measurement, wherein from the measurement signal of the at least one measuring track there is ascertained a value for the quantity of a disturbance present in the region of the sensor during the measurement on the value document, and a compensation of the deviations of the measurement signals of the measuring tracks capturing the value document, which deviations are caused by the disturbance present during the measurement, is carried out by means of said ascertained value for the quantity of the disturbance.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: October 27, 2015
    Assignee: GIESECKE & DEVRIENT GMBH
    Inventors: Steffen Schmalz, Lothar Schütt, Jürgen Schützmann
  • Patent number: 8544893
    Abstract: The invention relates to a security element for protecting documents of value, which has magnetic material. Furthermore, the invention relates to a document of value, a transfer material and method for producing such security elements and documents of value as well as a method and an apparatus for checking such a security element or document of value. According to the invention the security element has at least two magnetic materials, wherein the magnetic materials have different coercive field strengths and are applied onto and/or incorporated in the security element in such a manner that their remanence is equally high.
    Type: Grant
    Filed: October 11, 2005
    Date of Patent: October 1, 2013
    Assignee: Giesecke & Devrient GmbH
    Inventors: Jürgen Schützmann, Lothar Schütt
  • Publication number: 20090008922
    Abstract: The invention relates to a security element for protecting documents of value, which has magnetic material. Furthermore, the invention relates to a document of value, a transfer material and method for producing such security elements and documents of value as well as a method and an apparatus for checking such a security element or document of value. According to the invention the security element has at least two magnetic materials, wherein the magnetic materials have different coercive field strengths and are applied onto and/or incorporated in the security element in such a manner that their remanence is equally high.
    Type: Application
    Filed: October 11, 2005
    Publication date: January 8, 2009
    Inventors: Jurgen Schutzmann, Lothar Schutt
  • Patent number: 6229306
    Abstract: The method for measuring magnetic properties of sheet material is able to deliver reliable signals at both low and high magnetic particle density in the sheet material. First a measuring head converts the magnetic properties of the sheet material into electric signals. The electric signals produced by the measuring head are amplified in a certain signal range such that the lower-amplitude electric signals produced by the areas with low magnetic particle density of the sheet material are amplified to a greater extent than the electric higher-amplitude signals produced by the areas with high magnetic particle density of the sheet material. For this purpose the signal range is divided into at least three ranges which are each amplified constantly. The amplification in the two outer ranges is selected equal, and the amplification in the middle range greater than the amplification in the outer ranges.
    Type: Grant
    Filed: June 18, 1998
    Date of Patent: May 8, 2001
    Assignee: Giesecke & Devrient GmbH
    Inventors: Dieter Stein, Lothar Schütt