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. 09, 1997
Filed:
Apr. 19, 1993
Applicant:
Inventors:
Takayuki Matsuo, Yokohama, JP;
Kiyohisa Sugishima, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ;
U.S. Cl.
CPC ...
358475 ; 358406 ; 358446 ; 358504 ; 358509 ;
Abstract
An image reading apparatus has a projecting light source and a photo-sensitive device for receiving the projected light. In addition, a device is provided for measuring characteristics of the image reading apparatus while changing a light emission amount from the light source on the basis of an instruction by the user.