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:
Jan. 23, 2018
Filed:
Dec. 07, 2015
Lexmark International, Inc., Lexington, KY (US);
Christopher Alan Adkins, Lexington, KY (US);
James Ronald Booth, Nicholasville, KY (US);
Matthew David Clarke, Lexington, KY (US);
Graydon Randall Dodson, Lexington, KY (US);
Ellis Matthew King, Lexington, KY (US);
Adam Jude Ahne, Lexington, KY (US);
LEXMARK INTERNATIONAL, INC., Lexington, KY (US);
Abstract
Systems and methods for authenticating printer supply items using revocation lists are disclosed. Revocation lists are updated using DNSSEC to communicate between a printer and a DNS name server. A domain name is created containing a printer supply item serial number, a message digest, and a message authentication code. The domain name is sent to the DNS name server, and the returned IP address is used to update a revocation list. Other systems and methods are disclosed.