Patents by Inventor Gerald Carl Sienkiewicz

Gerald Carl Sienkiewicz 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).

  • Ribbon cartridge
    Patent number: 3941231
    Abstract: A ribbon cartridge for an endless loop inked ribbon suitable for use with a wire matrix printer, for example, is disclosed in which the cartridge includes elongated guide members to confine the path of the loop of ribbon outside of the cartridge to a predetermined path and to allow for insertion of the cartridge into a using machine without the necessity of threading inky ribbon through fixed guides on the machinery.
    Type: Grant
    Filed: July 3, 1974
    Date of Patent: March 2, 1976
    Assignee: International Business Machines Corporation
    Inventors: George Coleman Matuck, Gerald Carl Sienkiewicz, William Duncan Thorne