Patents by Inventor Margaret Duyck

Margaret Duyck 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).

  • Multiple-merchant credit card terminal
    Patent number: 5557087
    Abstract: The invention disclosed and claimed here is a multiple-merchant credit card authorization terminal ("CAT"). The CAT enables more than one merchant to input and obtain credit card authorization from a single CAT device. Likewise, transaction settlements may be handled for a single merchant or all of the merchants collectively at the same time. In the past, individual merchants had to use their own dedicated devices.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: September 17, 1996
    Inventor: Margaret Duyck