Patents by Inventor Otto J. Zimmerman

Otto J. Zimmerman 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).

  • Oscillating free swinging sifter apparatus
    Patent number: 3981403
    Abstract: A free swinging sifter apparatus which includes a suspension framework, a sieve or sifter housing, suspension members suspending the housing from the framework, selectively positionable weights movably mounted on opposite sides of the housing and means for concurrently rotating the weights about substantially vertical axes.
    Type: Grant
    Filed: October 2, 1974
    Date of Patent: September 21, 1976
    Assignee: Smico Corporation
    Inventors: Otto J. Zimmerman, Walton L. Mock