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:
Oct. 07, 2008
Filed:
Aug. 31, 2001
Applicants:
Kazuyoshi Tokunaga, Ibaraki, JP;
Kazuyuki Mitome, Ibaraki, JP;
Seiji Kageyama, Ibaraki, JP;
Inventors:
Assignee:
Ricoh Printing Systems, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 15/00 (2006.01); G06K 15/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
Invisible information are recorded in the form of pixels invisible to the naked eye and at a print density invisible to the naked eye.