Patents by Inventor Pieter Koek

Pieter Koek 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).

  • Mixing device
    Patent number: 4057226
    Abstract: A mixing device comprising a vessel and an agitator extending into the vessel in which the vessel is hermetically sealed from the atmosphere by a flexible member detachably connected with the wall and the agitator shaft. Means are provided to maintain the agitator shaft in a fixed angular position during the stirring operation.
    Type: Grant
    Filed: December 26, 1973
    Date of Patent: November 8, 1977
    Assignee: N.V. Machinefabriek Terlet
    Inventors: Jacob Mink de Mos, Pieter Koek