ALEXANDRIA, Va., July 7 -- Mark Miller of Parma, Ohio, and Frank Torrieri of Perry, Ohio, have developed a voice transmission system.

According to the U.S. Patent & Trademark Office: "A voice amplifier for attachment to a mask has a sound reflector that faces outwardly of the mask when the voice amplifier is attached to the mask. A speaker faces inwards towards the sound reflector. Sound waves emanate from the speaker inward towards the sound reflector, reflect off the sound reflector and exit the voice amplifier through an outer peripheral gap and travel outwardly from the mask."

An abstract of the invention, released by the Patent Office, said: "The voice amplifier has an on/off ...

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