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:
Apr. 26, 2011
Filed:
Apr. 18, 2007
Applicant:
Koji Nojima, Abiko, JP;
Inventor:
Koji Nojima, Abiko, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09C 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An encryption device which is capable of preparing an encrypted document not easily deciphered by a third person. The encryption device encrypts information formed on a recording member on the basis of a predetermined encryption code. A surface of the recording member is irradiated with light. An image of the irradiated surface of the recording member irradiated with the light is taken. The encryption code is prepared on the basis of the taken image of the irradiated surface.