Patents by Inventor Willi Rien

Willi Rien 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).

  • Method and device for the mechanical removal of a layer of alien material from a basic material
    Patent number: 6095903
    Abstract: A method for mechanical removal of a layer of alien material from a basic material of a disc-shaped optically readable information carrier. The layer of alien materials is removed from the basic material by a jet of deep-frozen particles applied under pressure.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: August 1, 2000
    Assignee: U.S. Philips Corporation
    Inventor: Willi Rien