Patents by Inventor Stefan Preuss

Stefan Preuss 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 for recording information in an optically readable data memory
    Patent number: 5243589
    Abstract: In a method for recording information in an optical data memory by surface exturing, a substrate surface is first pre-treated or sensitized by selective irradiation at relatively low fluence. For selectivity of irradiation, a mask, a holographic imaging process, or direct writing may be used. In a second step, the sensitized regions are ablated from the surface by means of spatially non-selective irradiation at a different wavelength and at relatively high fluence.
    Type: Grant
    Filed: June 5, 1992
    Date of Patent: September 7, 1993
    Assignee: Max-Planck-Gesellschaft zur Foerderung der Wissenschaften e.V.
    Inventors: Michael Stuke, Horst-Christian Langowski, Tobias Damm, Stefan Preuss