Interesting Old Patents

Apparatus and Method of Broadcasting Audible Sound using Ultrasonic Sound as a Carrier

Metadata

Patent Number: 6052336

Patent Date: April 18, 2000

Added to IOP: May 15, 2024, 12:34 a.m.

Short Description

Description of the directional uses of LRAD technology in static, mobile and man-portable for things like crowd control and as security for buildings.

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