Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Daniel E. Zimmermann0
David C. Copley0
Michael S. McDaniel0
Date of Patent
September 11, 2007
Patent Application Number
10873875
Date Filed
June 22, 2004
Patent Primary Examiner
Patent abstract
A method and apparatus for providing an audible alarm signal. The method and apparatus includes creating a rectangular pulse signal having a desired period and a desired first amplitude, adding a shaped modulation component to the rectangular pulse signal from the desired first amplitude to a desired second amplitude to create a modulating waveform, creating a carrier signal, and combining the carrier signal and the modulating waveform to create the audible alarm signal.
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