Patents by Inventor Hendrik Grampel

Hendrik Grampel 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).

  • Authenticatable media and method of authenticating
    Publication number: 20060104172
    Abstract: One method for playing a disk, comprises illuminating a first portion of the optical article with a first laser to obtain a first optical signal, wherein the first laser has a first wavelength, illuminating a second portion with a second laser to obtain a second optical signal, wherein the second laser has a second wavelength that is different from the first wavelength, and determining if the optical article is authentic by comparing the first optical signal and the second optical signal.
    Type: Application
    Filed: November 12, 2004
    Publication date: May 18, 2006
    Inventors: Hendrik Grampel, Sriramakrishna Maruvada, Vandita Pai-Paranjape, Radislav Potyrailo, Philippe Schottland, Marc Wisnudel