Patents by Inventor Robert Frankfurt

Robert Frankfurt 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).

  • Security credit card
    Patent number: 4931629
    Abstract: An unique credit card which can be registered to the holder and is virtually as unique as a finger print. A preferred embodiment of the invention is a credit card comprising a plastic base layer containing one or more distinctive gems retained thereto. Preferably the gem or gems are contained within receptacles in the plastic base layer. The distinctiveness of the gems can be recorded against the name of the proper holer, and fraudulent possession of the card detected.
    Type: Grant
    Filed: June 21, 1988
    Date of Patent: June 5, 1990
    Inventor: Robert Frankfurt