Patents by Inventor Helmut Kreissler

Helmut Kreissler 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).

  • Recording medium with an envelope, and an identification part therefor
    Patent number: 4769731
    Abstract: A recording medium possessing an envelope has at least one identification part which is mounted so that its position can be altered but it cannot be accidentally lost, and which is symmetrical about at least one axis, in particular a middle axis, and is associated with at least one wall of the envelope. To permit error-free assembly/handling, the identification part advantageously has a shape which permits at least two equivalent mounted positions on the envelope.
    Type: Grant
    Filed: February 27, 1986
    Date of Patent: September 6, 1988
    Assignee: BASF Aktiengesellschaft
    Inventors: Klaus Schoettle, Dietrich Gruehn, Kurt Schmidts, Heinz Berger, Helmut Kreissler
  • Method for the surface treatment of magnetic recording media
    Patent number: 4514937
    Abstract: A method and apparatus for burnishing the surface of magnetic recording media, wherein there is relative movement between the surface to be burnished and the abrasive member, and the abrasive member is urged against the said surface, the pressure applied being increased over a period of time or at a plurality of locations, and then being reduced again.
    Type: Grant
    Filed: January 15, 1982
    Date of Patent: May 7, 1985
    Assignee: BASF Aktiengesellschaft
    Inventors: Manfred Gehrung, Klaus Schoettle, Helmut Kreissler, Peter Rudolf, Joachim Hack, Friedrich Anslinger