Patents by Inventor Ralph L. Tenbrink

Ralph L. Tenbrink 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).

  • Attaching print disc to drive in impact printers
    Patent number: 3991873
    Abstract: A print disc and guide are configured so that the print disc can be mounted on a driving shaft transversely to the shaft axis. Removal and replacement of the print disc are thereby facilitated.
    Type: Grant
    Filed: June 11, 1975
    Date of Patent: November 16, 1976
    Assignee: Hewlett-Packard Company
    Inventors: Gary R. Paulson, Ralph L. Tenbrink