Knee pads for workers; Laser equipment designed for cutting, drilling, marking, engraving and shaping optical lenses for eyeglasses; Lenses for protective face shields; Lenses for welding helmets; Protective face-shields for protective helmets; Protective glasses; Safety helmets; Solderers' helmets; Welding helmets; Welding masks; Welding transformers; Workmen's protective face shields