Patents by Inventor David J. Ettelman

David J. Ettelman 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).

  • Stepping motor harmonic suppression
    Patent number: 4703243
    Abstract: A stepping motor including a plurality of stator poles wherein the stator poles are non-symmetrically displaced from their normal position to reduce harmonics in the torque/displacement crossing of the motor.
    Type: Grant
    Filed: April 17, 1986
    Date of Patent: October 27, 1987
    Assignee: Kollmorgen Technologies Corporation
    Inventors: David J. Ettelman, John G. Floresta