| http://www.w3.org/ns/prov#value | - Apparatus for generating and radiating ultrasonic sound waves for the control of pests comprising:(a) supporting means; (b) a transducer carried by said supporting means having a natural frequency of oscillation for providing sound waves when driven by an electrical signal, said sound waves being at frequencies normally inaudible to humans and intolerable by pests such as rodents and the like; (c)
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