Patents by Inventor Bjorn Christian Granfeldt

Bjorn Christian Granfeldt 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).

  • Payment system
    Patent number: 7006998
    Abstract: The invention relates to a payment system utilizing so called “smart cards”, which include a microprocessor attached to the card with associated memory circuits for storage of transactions, and which via a terminal can be supplied an available and for the card holder useable amount. According to the invention, a unique card number for said card, together with a PIN code chosen by the user and registered for the card, are transformed by means of the card microprocessor into a unique and preferably encoded user certificate for each individual card, which is used for verification of the authority of the user.
    Type: Grant
    Filed: March 17, 2001
    Date of Patent: February 28, 2006
    Assignee: AB EFB, Energiforbattringar
    Inventors: Björn Christian Granfeldt, Tomas Martin Gösta Hägg
  • Payment system
    Publication number: 20020138444
    Abstract: The invention relates to a payment system utilizing so called “smart cards”, which include a microprocessor attached to the card with associated memory circuits for storage of transactions, and which via a terminal can be supplied an available and for the card holder useable amount. According to the invention, a unique card number for said card, together with a PIN code chosen by the user and registered for the card, are transformed by means of the card microprocessor into a unique and preferably encoded user certificate for each individual card, which is used for verification of the authority of the user.
    Type: Application
    Filed: November 19, 2001
    Publication date: September 26, 2002
    Inventors: Bjorn Christian Granfeldt, Tomas Martin Gosta Hagg