DEVELOPED PHOTOGRAPHIC SLIDES SOUND

Brand	Owner	Address	Description
CF	CONSERVATION FOUNDATION, INC., THE	1717 MASSACHUSETTS AVE., N.W. WASHINGTON DC 20036	DEVELOPED PHOTOGRAPHIC SLIDES AND SOUND MOTION PICTURES;THE STIPPLING SHOWN ON THE DRAWING IS FOR SHADING PURPOSES ONLY.;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A sound focus speaker adopting a gas-filled sound lens enhances efficiency of transferring sound from a source to target area and of protecting a spread of transferred sound. The sound focus speaker includes a gas-filled sound lens, sound sources for generating sound and a sound-absorption room for surrounding the sound lens and the sound sources. Sound emitted from the sound focus speaker is focused at specific distance to make a focus point and not spread to the outer of the focus point from forming a sound area.