The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 08, 2008
Filed:
Nov. 12, 2004
Hendrik T. Van DE Grampel, Mijnsheerenland, NL;
Sriramakrishna Maruvada, Evansville, IN (US);
Vandita Pai-paranjape, Evansville, IN (US);
Radislav A. Potyrailo, Niskayuna, NY (US);
Philippe Schottland, Evansville, IN (US);
Marc B. Wisnudel, Clifton Park, NY (US);
Hendrik T. van de Grampel, Mijnsheerenland, NL;
Sriramakrishna Maruvada, Evansville, IN (US);
Vandita Pai-Paranjape, Evansville, IN (US);
Radislav A. Potyrailo, Niskayuna, NY (US);
Philippe Schottland, Evansville, IN (US);
Marc B. Wisnudel, Clifton Park, NY (US);
General Electric Company, Schenectady, NY (US);
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.