U.S. federal trademark · Serial No. 71520533 · Reg. No. 0443543
LAMINATED BUILDING AND STRUCTURAL MATERIAL IN FLAT AND CURVED PANEL SHAPES, COMPRISING A LIGHT-WEIGHT SANDWICH OF HIGH DENSITY FACES OVER A LOW-DENSITY CORE, FOR COMBINED INSULATING AND STRUCTURAL PURPOSES, AS IN AIRCRAFT FUSELAGES, COLD-STORAGE AND TROPICAL CHESTS
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