US Patent Issued to Drager Safety on July 14 for "Piezoelectric sounder device" (British Inventor)

ALEXANDRIA, Va., July 14 -- United States Patent no. 12,682,735, issued on July 14, was assigned to Drager Safety AG & Co. KGaA (Lubeck, Germany).

"Piezoelectric sounder device" was invented by Mark Winship (Tyne and Wear, Great Britain).

According to the abstract* released by the U.S. Patent & Trademark Office: "A piezo sounder device 100 comprising a piezo sounder 110 and a controller 120, wherein the controller 120 is configured, upon activation of the piezo sounder device 100, to drive the piezo sounder 110 at: a first frequency substantially corresponding to a resonant frequency of the piezo sounder 110 at a first operational temperature; and a second frequency substantially corresponding to a resonant frequency of the piezo sounder ...