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. 19, 2009
Filed:
Apr. 19, 2007
Applicant:
Nobuo Matsuoka, Yokohama, JP;
Inventor:
Nobuo Matsuoka, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01B 11/02 (2006.01); G01P 3/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
An image forming apparatus which can form an even image while maintaining high resolution. A speckle pattern detecting unit detects a speckle pattern on a surface of a photosensitive drum. A motor drive circuit controls the rotational speed of the photosensitive drum based on the detected speckle pattern on the surface of the photosensitive drum detected by the speckle pattern detecting unit.