Patents by Inventor Helmut Pfefferkorn

Helmut Pfefferkorn 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).

  • High voltage motor
    Patent number: D806030
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: December 26, 2017
    Assignee: Siemens Aktiengesellschaft
    Inventors: Helmut Pfefferkorn, Christoph Rogginger, Patric Willems, Guenther Winkler