Patents by Inventor John W. Pratt, Jr.

John W. Pratt, Jr. 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).

  • Resilient optical connector between a light conductor and an ionization bulb
    Patent number: 4478484
    Abstract: There is disclosed an optical system for reading light-activatable marks on a record medium. The system includes a coupling for connecting a light bulb and a light conductor which allows for relative movement between the light bulb and the light conductor while maintaining light transmitting contact therebetween.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: October 23, 1984
    Assignee: Monarch Marking Systems, Inc.
    Inventor: John W. Pratt, Jr.
  • Stuffed ribbon cartridge
    Patent number: 3973707
    Abstract: A spoolless ribbon cartridge containing a length of inked ribbon which is formed into an endless loop and stuffed into the cartridge to form a plurality of random convolutions or folds of ribbon therein. The cartridge has a specially-shaped ribbon storage compartment, in the general shape of a kidney, which compartment provides for a smooth flow of ribbon therethrough and enables a greater length of ribbon to be stored therein when compared to prior art cartridges.
    Type: Grant
    Filed: August 28, 1975
    Date of Patent: August 10, 1976
    Assignee: NCR Corporation
    Inventors: John W. Pratt, Jr., David E. Filsinger