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. 28, 1990
Filed:
Feb. 02, 1989
Applicant:
Inventor:
Hiraku Sonobe, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 13 ; 360114 ; 369100 ; 369116 ;
Abstract
An optical recording apparatus is disclosed in which a recording medium is scanned by a beam of light to record information on the recording medium, to reproduce the recorded information and also to erase the recorded information. The beam spot formed on the recording medium for erasing has a larger spot width measured in the direction perpendicular to the scan direction than that of the beam spot for recording.