Patents by Inventor David W. Mathew

David W. Mathew 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).

  • Electric-acoustic testing device
    Patent number: D884515
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: May 19, 2020
    Assignee: AUDIO PRECISION, INC.
    Inventor: David W. Mathew
  • Audio analyzer
    Patent number: D884516
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: May 19, 2020
    Assignee: AUDIO PRECISION, INC.
    Inventor: David W. Mathew
  • Audio analyzer
    Patent number: D884517
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: May 19, 2020
    Assignee: AUDIO PRECISION, INC.
    Inventor: David W. Mathew
  • Audio analyzer
    Patent number: D920816
    Type: Grant
    Filed: December 20, 2018
    Date of Patent: June 1, 2021
    Assignee: AUDIO PRECISION, INC.
    Inventor: David W. Mathew