[ INSTALLATIONS FOR HEATING-NAMELY, FLEXIBLE HEATING ELEMENTS SUCH AS FLEXIBLE ETCHED AND MOLDED-TO-SHAPE HEATERS, INCLUDING HEATED GASKETS, ADHESIVE BACKED RESISTANCE HEATERS, WIRE AND ETCHED FOIL HEATING ELEMENTS AND HEATING FILMS ]

HELMET FACE SHIELDS, NUCLEAR FLASH PROTECTION SHIELDS AND OTHER COMPONENTS OF OPTICAL DEVICES HAVING USEFUL TRANSMISSION OF ELECTROMAGNETIC RADIATION

TRANSPARENT WINDSHIELDS CUT TO SIZE FOR VEHICLES SUCH AS AIRCRAFT, MARINE VESSELS, LAND VEHICLES [, AND MISSILES ]