Patents by Inventor Douglas W. Pfaff

Douglas W. Pfaff 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).

  • Combined pre-filled cartridge-needle unit and holder
    Patent number: D366698
    Type: Grant
    Filed: September 29, 1993
    Date of Patent: January 30, 1996
    Assignee: Sterling Winthrop, Inc.
    Inventors: Mark A. Stiehl, William A. Bergstresser, John J. Niedospial, Raymond P. Chapman, Berle A. Dale, Richard J. Felts, Douglas W. Pfaff