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. 18, 2002
Filed:
Mar. 07, 2001
Dieter Pauschinger, Berlin, DE;
Francotyp-Postalia AG & Co., Birkenwerder, DE;
Abstract
In a postage meter machine that has a printing unit with a replaceable print head, a print head for such a postage meter machine and a method for the authentication of such a print head, a number of manipulation possibilities are precluded, such as refilling an authorized print head, unauthorized ink usage of a printhead and using an authorized print head in a conventional printer without paying fees for franking. For this purpose a security code is generated by an encryption algorithm from a first identification code attached to the print head and from a second identification code stored in a memory unit allocated to the print head, and is compared to a security code that is likewise stored in the memory unit when the print head is manufactured.