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. 14, 2005
Filed:
Feb. 15, 2000
Applicant:
Michael George Bunn, Reading, GB;
Inventor:
Michael George Bunn, Reading, GB;
Assignee:
Fujitsu Services Limited, Slough, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L009/00 ;
U.S. Cl.
CPC ...
Abstract
A method for authenticating a printed document is described. A document producer sends information to be included in a document to an authentication authority. The authentication authority cryptographically generates an authentication code from this information, and sends the authentication code back to the document producer. The document producer then prints the document, including both the information and the authentication code, and a bar code representing the authentication code. A document checker scans in the bar code, and cryptographically checks the authentication code against the information in the document.