US PATENT SUBCLASS 359 / 444
.~ With sound producer

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

443  DF  PROJECTION SCREEN {13}
444.~ With sound producer

DEFINITION

Classification: 359/444

With sound producer:

(under subclass 443) Subject matter including a loudspeaker or other sound producing means combined with the screen.

SEE OR SEARCH CLASS

352, Optics: Motion Pictures,

36, for motion picture devices combined with screens and sound producers.

353, Optics: Image Projectors,

18, for an image projector in combination with a sound producer.

381, Electrical Audio Signal Processing Systems and Devices,

150+, for electrical loudspeakers, per se.