Patents by Inventor Frank V. Haymann

Frank V. Haymann 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).

  • Preventing unauthorized use of a credit card
    Patent number: 5365046
    Abstract: A method of validating a credit card includes the steps of issuing a credit card to a holder, the card having an account number on it. The holder is issued with a personal identification number (PIN). Before a transaction involving the credit card can be authorized, a validation transaction must be carried out in which the credit card is inserted into an electronic terminal and the PIN code is entered. The PIN code and the account number are compared with information stored in a database, and only if the PIN code corresponds correctly to the account number is use of the credit card authorized. The method prevents credit cards being used for transactions involving amounts greater than an unauthorized transaction limit applying to the card in question.
    Type: Grant
    Filed: March 15, 1993
    Date of Patent: November 15, 1994
    Inventor: Frank V. Haymann
  • Display card holder
    Patent number: D274278
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: June 12, 1984
    Assignee: Sable Enterprises (Proprietary) Limited
    Inventors: Frank V. Haymann, David A. King