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:
Jan. 15, 1991
Filed:
May. 25, 1988
Christian Maury, Voisins le Bx, FR;
Bull S.A., Paris, FR;
Abstract
A mode of writing on a magnetic recording carrier (DISC) where the information is distributed over a plurality N of tracks, each track being associated with at least one reference zone (ZRP.sub.ij) including preamble information, absolute address information and fine-position information. According to the invention, the mode of writing is characterized in that the reference zone includes a first portion (GCP.sub.ij) comprising preamble and address information and a second portion (GDP.sub.ij) comprising fine-position information, the first portion being disposed and centered over the track of serial number j, while the second portion is offset by one-half of a track with respect to the center of that track and on the same side of that track. The invention is applicable to magnetooptical disk memories.