Patents by Inventor David P. Bull

David P. Bull 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).

  • Cover for tumbler
    Patent number: D885122
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: May 26, 2020
    Assignee: Dart Industries Inc.
    Inventor: David P. Bull
  • Tumbler
    Patent number: D889203
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: July 7, 2020
    Assignee: Dart Industries Inc.
    Inventor: David P. Bull
  • Tumbler
    Patent number: D889204
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: July 7, 2020
    Assignee: Dart Industries Inc.
    Inventor: David P. Bull