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:
Sep. 08, 1998
Filed:
May. 09, 1997
Applicant:
Inventors:
Hiroto Kitai, Tokyo, JP;
Kazuaki Matsumoto, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
369 4428 ; 369 54 ; 235456 ;
Abstract
An information recording and/or reproducing apparatuses for performing recording and/or reproduction of information on a recording medium with a light beam emitted from an optical head, includes a vibration wave driving device for relatively moving the optical head to the medium, and a device for detecting information corresponding to a relation between a control signal for driving the vibration wave driving device and a relative movement velocity in the relative movement. The vibration wave driving device is controlled based on the information detected.