Patents by Inventor Frank J. DeMaine

Frank J. DeMaine 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).

  • Ink jet drop generator
    Patent number: 3958249
    Abstract: Nozzle for creating perturbations in a pressurized liquid filament issuing from an orifice in the nozzle in which the perturbations are caused by varying the cross-section of the orifice to produce corresponding variations in the cross-section of the liquid filament and induce subsequent breakup of the filament into a succession of drops.
    Type: Grant
    Filed: December 18, 1974
    Date of Patent: May 18, 1976
    Assignee: International Business Machines Corporation
    Inventors: Frank J. DeMaine, Robert E. Pelkie, Normand C. Smith, Reinhold E. Tomek