Patents by Inventor Christian H. F. Velzel

Christian H. F. Velzel 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).

  • Device for working a workpiece using laser light
    Patent number: 5029243
    Abstract: A device for working a workpiece by means of laser light includes a laser, a beamsplitter for splitting the laserbeam into at least two sub-laserbeams of substantially identical intensities, and a control unit which controls the light intensity of the laser and the movement of a workpiece support and the laserbeam relative to each other. The beamsplitter includes at least one digital-phase grating which divides the laserbeam into a plurality of sub-laserbeams to produce a pattern of laser spots onto the workpiece.
    Type: Grant
    Filed: September 14, 1989
    Date of Patent: July 2, 1991
    Assignee: U.S. Philips Corporation
    Inventors: Hans Dammann, Gert Rabe, Paul J. Patt, Christian H. F. Velzel, Klaus B. Schildbach