TRUSONIC FREE-CONE SUSPENSION
SOUND REPRODUCERS, LOUDSPEAKERS, LOUDSPEAKER ENCLOSURES AND CABINETS, LOUDSPEAKER SYSTEMS AND SONIC GENERATOR SYSTEMS; CROSS-OVER NETWORKS AND CONTROLS THEREFOR, TWEETERS, WOOFERS, AND MID-RANGE LOUDSPEAKERS AND COMBINATIONS THEREOF INDEPENDENTLY OF AND ASSEMBLED WITHIN ACOUSTIC ENCLOSURES AND CABINETS
Expired · January 26, 1962 · 72136693 ·