AMPLIFIER LOUDSPEAKER SET

Brand Owner Address Description
SPOKESMAN AMERICAN TELEPHONE AND TELEGRAPH COMPANY 32 Avenue of the Americas New York NY 100132412 AMPLIFIER AND LOUDSPEAKER SET [ USED WITH TELEPHONE COMMUNICATIONS EQUIPMENT ];
 

Where the owner name is not linked, that owner no longer owns the brand

   
Technical Examples
  1. A loudspeaker apparatus is provided with a loudspeaker unit attached to an inner panel. The inner panel of the loudspeaker unit is provided with: an opening to which the loudspeaker unit is attached; a volume unit in which the loudspeaker unit is housed from the opening to form a closed space; and a groove passing through to the volume unit. The loudspeaker unit is housed in the volume unit, and a rear space of the loudspeaker unit in the volume unit is used as an acoustic volume unit of the loudspeaker unit.