Patents by Inventor Andrew Thomas Nelson Sumwalt

Andrew Thomas Nelson Sumwalt 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).

  • Electrical plug
    Patent number: D738308
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: September 8, 2015
    Assignee: Steelcase Inc.
    Inventors: Andrew Thomas Nelson Sumwalt, Duck Young Kong, Mark McKenna
  • Electrical plug
    Patent number: D738309
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: September 8, 2015
    Assignee: Steelcase Inc.
    Inventors: Andrew Thomas Nelson Sumwalt, Duck Young Kong, Mark McKenna
  • Electrical module outlet
    Patent number: D738311
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: September 8, 2015
    Assignee: Steelcase Inc.
    Inventors: Andrew Thomas Nelson Sumwalt, Duck Young Kong, Mark McKenna
  • Electrical housing cover
    Patent number: D746237
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: December 29, 2015
    Assignee: Steelcase Inc.
    Inventors: Andrew Thomas Nelson Sumwalt, Duck Young Kong, Mark McKenna
  • Electrical housing cover
    Patent number: D746238
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: December 29, 2015
    Assignee: Steelcase Inc.
    Inventors: Andrew Thomas Nelson Sumwalt, Duck Young Kong, Mark McKenna
  • Electrical hub
    Patent number: D761733
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: July 19, 2016
    Assignee: Steelcase Inc.
    Inventors: Andrew Thomas Nelson Sumwalt, Duck Young Kong, Mark McKenna
  • Electrical hub
    Patent number: D762177
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: July 26, 2016
    Assignee: Steelcase Inc.
    Inventors: Andrew Thomas Nelson Sumwalt, Duck Young Kong, Mark McKenna