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US 4,791,409 AGranted
Security system for electrical appliances and other items with electrical circuitry
OwnerPhilip L. Reidinventor
Life of this patent
Estimating the term…
Abstract
A security system for household appliances includes a signal source operating within a zone about the household. A receiver within the household appliances receives the signal and permits operability of the apparatus when the signal is received but which disables the appliance upon removal from the zone and away from the signal source.
Claims3
A security system for electrical household appliances having electrical circuitry, comprising:
- a signal source emitting a coded signal within a specified zone about said household;
- and
- a receiver for said emitted signal attached to the electrical circuitry of said appliance to render said appliance operable inside said specified zone and inoperable outside said zone.
Dependencies are inferred from the claim text.