Patents by Inventor William T. Flint

William T. Flint 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).

  • Encapsulated backplate for electret transducers
    Patent number: 4442324
    Abstract: Electrically conductive sheets comprising backplates for electret transducers are substantially encapsulated with hydrophobic electrically insulating coatings. The coatings are melt bonded to both faces of the sheets and to the edges of the sheet periphery. Likewise, the coatings are melt bonded to the interior edges of acoustic apertures in the sheets.
    Type: Grant
    Filed: June 24, 1982
    Date of Patent: April 10, 1984
    Assignee: Tibbetts Industries, Inc.
    Inventors: Senior N. Blanchard, William T. Flint, George C. Tibbetts, Joseph A. Sawyer