sectional overhead commercial and industrial metal doors; two sided steel polyurethane core sectional overhead doors, and parts thereof, namely, frames, panels, torsion springs, tracks and hinges

SECTIONAL OVERHEAD COMMERCIAL AND INDUSTRIAL METAL DOOR UNITS; TWO SIDED STEEL POLYURETHANE CORE SECTIONAL OVERHEAD DOORS, AND PARTS THEREOF, NAMELY, FRAMES, PANELS, TORSION SPRINGS, TRACKS AND HINGES

metal door components, namely, steel panels having a polyurethane core for sectional overhead commercial and industrial doors and parts therefor