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:
May. 20, 2008
Filed:
Dec. 12, 2001
John J. Hart, Iii, Mashpee, MA (US);
Richard B. Levine, Marstons Mills, MA (US);
Andrew R. Lee, Marlborough, MA (US);
Daniel G. Howard, Mashpee, MA (US);
John J. Hart, III, Mashpee, MA (US);
Richard B. LeVine, Marstons Mills, MA (US);
Andrew R. Lee, Marlborough, MA (US);
Daniel G. Howard, Mashpee, MA (US);
ECD Systems, Inc., Marstons Mills, MA (US);
Abstract
Theft, distribution, and piracy of digital content on optical media (software, video, audio, e-books, any content of any kind that is digitally stored and distributed) is often accomplished by copying it directly to another disc using commonly available copy tools and recordable optical media, or the copying of media to another mass manufactured disc. Methods which cause the copy process to become lengthy and inconvenient, or which produce copies that are significantly measurably different from the original and therefore be recognizable as copies, deter or prevent an unauthorized individual from making copies. This is accomplished by modifying the optical path of an optical medium to include regions of selective distortion. This, in turn, modifies the read operation of the data in the regions, which can be used to identify and authenticate the medium.