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wallflower
on Feb 24, 2008
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Can Apple Patent the Pinch? Experts Say It's Possi...
U.S. Patent #5,493,618 "Method and apparatus for activating switches in response to different acoustic signals"
a.k.a. The Clapper "Clap on, Clap off"
http://tinyurl.com/3cp6cd
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a.k.a. The Clapper "Clap on, Clap off"
http://tinyurl.com/3cp6cd