Feedback device

Details Feedback device Feedback device

2005-10-19

2009-06-23

Crosland, Donnie L (Department: 2612)

Communications: electrical

Audible indication

C340S384500, C340S692000, C340S007620, C705S016000, C705S023000

Reexamination Certificate

active

07551060

ABSTRACT:
A feedback device1including an interface2for receiving a first signal3from a point of sale console4. A processor5is responsive to signal3for selectively defining a second signal, in the form of an inaudible ultrasonic transmission6. An output, in the form of an ultrasonic transducer7, is responsive to processor5for propagating transmission6to provide only in a predetermined spatially defined transmission zone8an audible signal9indicative of signal3. Signal9is substantially inaudible outside of zone8.

REFERENCES:
patent: 6281796 (2001-08-01), Canipe et al.
patent: 6330973 (2001-12-01), Bridgelall et al.
patent: 2003/0018477 (2003-01-01), Hinde

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