11 PANEL HEATING ELEMENTS FOR HEATING CEILINGS, WALLS, FLOORS, PANELS, PIPELINES, CHEMICAL PLANTS; HEATING PANELS FOR LIVESTOCK PENS AND SMALL ANIMAL CAGES; HEATING PANELS TO BE ATTACHABLE TO MIRRORS; PORTABLE HEATING PANELS FOR SPACE HEATING BUILDINGS, MOBILE HOMES, AND FOR OUTDOOR USE; AND HEATING PANELS FOR USE IN CONTAINERS IN THE NATURE OF CHESTS