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:
Jun. 21, 2011
Filed:
Apr. 28, 2006
Johannes Gerardus Fredericus Kablau, Eindhoven, NL;
Johannes Gerardus Fredericus Kablau, Eindhoven, NL;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
An optical data storage medium () comprising a dye-based recording layer is described. It has substantially parallel tracks for recording user information in a pattern of optically detectable marks, the tracks being provided with a guide groove, the groove being present in a user data area () and in an information area () and being trackable by a focused radiation beam () with the push pull method. The value of the normalized push pull signal (PPN) in the unrecorded information area is PPN-i and the value of PPN in the unrecorded user data area is PPN-u and PPN-i is lower than PPN-u. It is achieved that the information area of such an optical data storage may be read by a legacy optical data drive without causing damage to the drive. Further an apparatus for reading and a corresponding method are described.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile