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.:

US 7519820 B1

PDF
Full Text
Expired
Date of Patent:
Apr. 14, 2009

Filed:

Aug. 26, 2003
Applicants:

Ryoji Watanabe, Kanagawa, JP;

Akihiko Takada, Kanagawa, JP;

Masayoshi Sakakibara, Kanagawa, JP;

Hajime Kishimoto, Kanagawa, JP;

Yasuo Horino, Tokyo, JP;

Toshiyuki Yano, Kangawa, JP;

Yasuhiro Matsuo, Kanagawa, JP;

Inventors:

Ryoji Watanabe, Kanagawa, JP;

Akihiko Takada, Kanagawa, JP;

Masayoshi Sakakibara, Kanagawa, JP;

Hajime Kishimoto, Kanagawa, JP;

Yasuo Horino, Tokyo, JP;

Toshiyuki Yano, Kangawa, JP;

Yasuhiro Matsuo, Kanagawa, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 9/32 (2006.01);
U.S. Cl.
CPC ...
Abstract

An image having no secrecy is printed on a non-secret information display area of an original paper, whereas an image having secrecy, which should be originally printed, is not printed on a secret image display area. When the original paper is copied on a printing paper, an image read from the original paper is printed on a secret image display area, whereas a secret image is printed on a non-secret information display area only when an access operation to the secret image is authenticated.


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