Patents by Inventor David Greensmith

David Greensmith 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).

  • Frequency converter
    Patent number: D741259
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: October 20, 2015
    Assignee: ABB Technology Oy
    Inventors: Mohammad Siddiqui, Guy Lamb, David Greensmith, Bob Combes
  • Device for control of electric power
    Patent number: D811332
    Type: Grant
    Filed: November 28, 2016
    Date of Patent: February 27, 2018
    Assignee: ABB Technology Oy
    Inventors: Mohammad Siddiqui, David Greensmith