Patents by Inventor Jean-Louis Duhamel

Jean-Louis Duhamel 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 and device for mastering a copy-protected optical disc and copy-protected optical disc
    Publication number: 20040130997
    Abstract: The invention relates to a process and a device for the mastering of an optical disk protected against copying and such an optical disk.
    Type: Application
    Filed: October 28, 2003
    Publication date: July 8, 2004
    Inventors: Jean-Louis Duhamel, Laurent Guenery, Gerard Godmer, Sylvin de Magnienville, Francois-Xavier Pirot
  • Copy-protected optical disk and protection process for such disk
    Patent number: 6738331
    Abstract: The disclosure relates to an optical disk of the type including at least one spiral track on which information marks are written in sectors whose addresses are substantially sequential along the track, wherein said disk includes a copy protection zone (PZ) comprising two parts of equal size each including a series of sectors designated by identical addresses on each of the two parts, the data written in this zone being shared between the sectors of the two parts, each sector of the zone also carrying an identifier (D1, D2) characteristic of the part to which the sector belongs, and specific protection data to enable verification of the presence and constitution of said protection zone (PZ) and to enable use of the data written in this zone, at least part of said specific protection data being recorded on said disk. The invention is notably applicable to anti-piracy protection of CD-ROM and DVD-ROM type disks.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: May 18, 2004
    Assignees: Thomson-CSF, MPO International
    Inventors: François-Xavier Pirot, Jean-Louis Duhamel, Marc Des Rieux, François Le Carvennec
  • Copy-protected optical disk and protection process for such disk
    Publication number: 20010024411
    Abstract: The disclosure relates to an optical disk of the type including at least one spiral track on which information marks are written in sectors whose addresses are substantially sequential along the track, wherein said disk includes a copy protection zone (PZ) comprising two parts of equal size each including a series of sectors designated by identical addresses on each of the two parts, the data written in this zone being shared between the sectors of the two parts, each sector of the zone also carrying an identifier (D1, D2) characteristic of the part to which the sector belongs, and specific protection data to enable verification of the presence and constitution of said protection zone (PZ) and to enable use of the data written in this zone, at least part of said specific protection data being recorded on said disk. The invention is notably applicable to anti-piracy protection of CD-ROM and DVD-ROM type disks.
    Type: Application
    Filed: February 9, 2001
    Publication date: September 27, 2001
    Applicant: THOMSON-CSF
    Inventors: Francois-Xavier Pirot, Jean-Louis Duhamel, Marc Des Rieux, Francois Le Carvennec