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:
Feb. 25, 1997
Filed:
Jun. 02, 1995
Edward R Moynihan, Lebanon, NH (US);
David W Gailus, Merrimack, NH (US);
Robert G Palifka, Orford, NH (US);
Paul A Hoisington, Norwich, VT (US);
Nathan P Hine, South Strafford, VT (US);
David Adams-Brady, Meriden, NH (US);
Melvin L Biggs, Norwich, VT (US);
Marlene M McDonald, Enfield, NH (US);
Steven H Barss, Wilmot Flat, NH (US);
Diane Mackay, Corinth, VT (US);
Bruce A Paulson, Newport, NH (US);
Stephen C Mackay, Corinth, VT (US);
Spectra, Inc., Keene, NH (US);
Abstract
In the embodiments described in the specification, a ceramic piezoelectric plate is polarized by compressing the plate between electrode plates with intervening slightly conductive rubber sheets or by applying electric charge from a corona discharge device to one surface of the plate while the opposite surface is grounded until the applied charge is sufficient to create a breakdown.