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:
Mar. 01, 1994
Filed:
Oct. 31, 1990
Robert E Richards, Atlanta, GA (US);
Other;
Abstract
There is disclosed an improved optically readable disk having an optically readable portion arranged on said disk so as to be readable by an optical reading unit and a magnetically readable and writable portion arranged on said disk so as to be both readable and writable by a magnetic read/write unit. The magnetically readable and writable portion of the disk preferably includes data or information recorded thereon defining a desired playback parameter and/or sequence for the data or information optically recorded on the optically readable portion of the disk. Also disclosed is an improved optical disk playback apparatus comprising a drive unit for rotatably driving an optical disk, an optical reading unit operatively arranged for reading data optically recorded on said disk as said disk is rotated and a magnetic read/write unit operatively arranged for both magnetically reading data from and magnetically writing data to a magnetically readable and writable portion of said disk as said disk is rotated. An improved method of playing back data or information optically recorded on a magneto-optical disk is also disclosed.