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Ultrasonic Switch/ alarm for POS Systems Disclosure Number: IPCOM000045497D
Original Publication Date: 1983-Apr-01
Included in the Prior Art Database: 2005-Feb-07

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Schall, TE Shekita, GA [+details]


This article describes potential uses for ultrasonic range-finding transducers in point of sale (POS) terminals. The use of such transducers for energy conservation and security purposes is discussed.