Patents by Inventor Juergen Helmus

Juergen Helmus has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for verifying digital franking notes
    Patent number: 7580529
    Abstract: Digital franking notes generated in customer systems and comprise cryptographic information that is used for verifying the postage indicia in local payment assurance systems. A data key used for generating the postage indicia is generated in a value transfer center and transmitted via a central payment assurance system to the local payment assurance systems, which import the key in order to verify franking notes generated using the key. The local payment assurance systems notify the value transfer center of successful key imports. After a successful import, the value transfer center issues a data key to the customer systems and postage indicia are verified by decrypting the contained cryptographic information in the local payment assurance systems.
    Type: Grant
    Filed: January 21, 2004
    Date of Patent: August 25, 2009
    Assignee: Deutsche Post AG
    Inventors: Peter Fery, Juergen Helmus, Gunther Meier, Dieter Stumm, Carsten Vullriede