Patents by Inventor Eduard Derksen

Eduard Derksen 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).

  • Process as safety concept against unauthorized use of a payment instrument in cashless payment at payment sites
    Patent number: 5478993
    Abstract: The process provides a staggered degree of security as a safety concept against unauthorized use of a transaction card for purchasing of items. The card has four memories memorizing an amount of money, a money installment and its limiting value, a number of usable transactions and its limiting value, further data for doing an identity check of the ownership of the cardholder and also an authenticity check. The card is usable at three different types of payment instruments with or without an identity check and/or an authenticity check.
    Type: Grant
    Filed: January 18, 1994
    Date of Patent: December 26, 1995
    Assignee: Ascom Autelca AG.
    Inventor: Eduard Derksen