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:
May. 21, 1991
Filed:
Apr. 13, 1989
Hideki Hosoya, Yokohama, JP;
Akio Aoki, Tokyo, JP;
Masahiko Enari, Yokohama, JP;
Masayuki Usui, Yokohama, JP;
Hiroshi Matsuoka, Kawasaki, JP;
Kazuhiko Matsuoka, Yokohama, JP;
Kazuo Minoura, Yokohama, JP;
Kenichi Suzuki, Yokohama, JP;
Satoshi Shikichi, Tokyo, JP;
Fumiaki Kawaguchi, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an optical information recording medium of the type wherein information is recorded or reproduced when a light beam scans each of a plurality of mutually parallel tracking tracks, an auxiliary track is extended between the adjacent tracking tracks and has at least one portion in parallel with the tracking tracks. In a method of recording or reproducing information by scanning a light beam on each of a plurality of mutually parallel tracking tracks on the recording medium, the recording medium has an auxiliary track which is extended between the adjacent tracking tracks and which has at least one portion in parallel with the tracking tracks and the light beam is kicked in the parallel portion of the auxiliary track.