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:
Nov. 30, 2004
Filed:
Feb. 12, 2002
Applicant:
Inventors:
Hiroshi Yoshiura, Tokyo, JP;
Isao Echizen, Yokohama, JP;
Junichi Taguchi, Sagamihara, JP;
Akira Maeda, Yokohama, JP;
Takao Arai, Yokohama, JP;
Toshifumi Takeuchi, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06K 9/00 ;
U.S. Cl.
CPC ...
G06K 9/00 ;
Abstract
A method of embedding information into contents includes a changeable range calculating step of obtaining a range where value change of the contents is imperceptible to the human being and a step of embedding information by changing the values of the contents within the changeable range.