The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 10, 1984
Filed:
Jun. 24, 1982
Applicant:
Inventors:
Senior N Blanchard, Spruce Head, ME (US);
William T Flint, Owls Head, ME (US);
George C Tibbetts, Camden, ME (US);
Joseph A Sawyer, Camden, ME (US);
Assignee:
Tibbetts Industries, Inc., Camden, ME (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R / ;
U.S. Cl.
CPC ...
1791 / ;
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.