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:
Jun. 12, 2007
Filed:
Feb. 04, 2004
Hiroshi Sako, Shiki, JP;
Naohiro Furukawa, Hachioji, JP;
Hisashi Ikeda, Kunitachi, JP;
Yosuke Kato, Tokyo, JP;
Hiroshi Sako, Shiki, JP;
Naohiro Furukawa, Hachioji, JP;
Hisashi Ikeda, Kunitachi, JP;
Yosuke Kato, Tokyo, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A digital pen-based application form filling system with a modification prevention function, which eliminates a possibility that digital information initially written in digital paper using a digital pen may be modified deliberately or accidentally. The system prints a new fine pattern over areas in already written digital paper whose contents one wishes to protect against being modified. This printing adds a fine pattern to an original dot pattern already present on the digital paper to make it theoretically impossible to enter information into these areas using the digital pen.