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:
Aug. 30, 1994
Filed:
Nov. 22, 1993
Tsukasa Ogino, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An apparatus for recording and/or reproducing information with respect to a disk-like recording medium having a recording surface divided into a plurality of concentric circular zones each including a plurality of tracks with an address recorded thereon at an angular velocity or frequency varying with the individual zones, includes, a device for scanning the tracks for recording and/or reproducing information, a device for detecting an address of a track being scanned by the recording and/or reproducing device, a device for shifting the recording and/or reproducing device from a track being scanned to another track, and a control device for determining, if an address of a desired track cannot be detected when accessing the desired track during shifting of the recording and/or reproducing device to a zone different from a zone to which the desired track belongs, and shifting, as a result, the recording and/or reproducing device to a different track.