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:
Dec. 03, 1991
Filed:
Feb. 13, 1990
Kiyonobu Endo, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In an optical recording medium a substrate is provided having at least a recording surface and a recording layer on an area of the recording surface having a length in a longitudinal direction. A set of linear continuous tracking tracks is formed on the recording surface. The tracking tracks have a length which is greater in the longitudinal direction than the length of the recording layer with a constant distance between adjacent tracks, which distance is equal to or larger than twice the width of each track. Recording areas are arranged and constructed so as to record information irradiated with a light beam. Each of those areas is positioned between neighboring tracking tracks.