Patents by Inventor Udo Petri

Udo Petri 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).

  • Publication number: 20200012091
    Abstract: A method for changing a shape of a surface of an optical element by particle irradiation includes: modelling the problem of determining a resulting change of the surface shape of the optical element from a control variable; determining a predefinition for the control variable of the particle irradiation from a predefined desired change of a surface shape of the optical element by ascertaining an extremum of a merit function; and radiating particles onto the surface of the optical element with a locally resolved effect distribution corresponding to the determined predefinition for the control variable, for the purpose of producing local surface changes at the surface of the optical element. Ascertaining the extremum corresponds to the solution of an Euler equation. The Euler equation defines an integral operator. The eigenvalues of the integral operator are determined, and the predefinition is a linear combination of a finite number of eigenfunctions of the integral operator.
    Type: Application
    Filed: July 2, 2019
    Publication date: January 9, 2020
    Inventors: Walter Pauls, Christoph Petri, Sebastian Vauth, Udo Kubon
  • Patent number: 5289538
    Abstract: A circuit arrangement converts signals and information between analog junction lines and digital terminal devices in communications exchanges. A decentralized control device is provided in order to process and pass on switching criteria and codes received and sent to the respective analog junction line, inside and outside the audio frequency band, the circuit arrangement including a plurality of line interfaces, each coupled directly to a respective one of the decentralized control devices, for the switching criteria and codes to be exchanged outside of the audio frequency. At least one digital signal processor is provided for processing the codes to be exchanged within the audio frequency band, the digital signal processor being looped in via a hybrid connection and converter in a speech path which cooperates with the control device.
    Type: Grant
    Filed: March 14, 1991
    Date of Patent: February 22, 1994
    Assignee: Telenorma GmbH
    Inventors: Walter Lauer, Udo Petri, Gerd Ponitz
  • Patent number: 4991167
    Abstract: A process and apparatus for a voice controlled attenuation adjustment in telephone transmission circuits is disclosed. Signals in the sending and receiving directions are decomposed into sub-band signals in a set of frequency sub-bands. Each frequency sub-band is associated with an attenuation device for each direction of transmission. Depending on the level of activity in each direction in a particular sub-band, the attenuation values of the attenuation devices of that particular sub-band are adjusted. The sub-band signals are then recombined.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: February 5, 1991
    Assignee: Telenorma Telefonbau und Normalzeit GmbH
    Inventors: Udo Petri, Eberhard Hansler, Birger Hatty