73671290
Jul 13, 1987
Nov 8, 1988
BUILT-IN SHIELD SYSTEMS FOR PROJECTION SCREENS OR STAGES OR THE LIKE CONSISTING OF FIXED AND MOVABLE WALL PANELS, ELECTRICALLY POWERED TROLLEYS, STRUCTURAL BEAMS, STRUCTURAL COLUMNS, STEEL TRACKS, DRIVE MOTORS, ELECTRIC CONTROLS, FACIA, AND TRIM ALL SOLD AS A UNIT
Electrical and Scientific Apparatus