19 RADIATORS, OIL COOLERS, AND AIR CONDITIONERS, AND COMPONENTS THEREOF FOR AUTOMOTIVE VEHICLES
23 RADIATORS, RADIATOR PROTECTION GRIDS, OIL COOLERS, [ TEMPERATURE CONTROL DAMPERS, ] FIX LOUVERS, [ FIRE DAMPERS, SHUTTERS, ] AND AIR CONDITIONERS AND COMPONENTS THEREOF
34 UNIT HEATERS [ , UNIT VENTILATORS, AIR CONDITIONERS, ] AND COMPONENTS THEREOF [ , RADIATORS AND CENTRAL STATION AIR HANDLERS ]
THE MARK CONSISTS OF A FANCIFUL REPRESENTATION OF THE LETTER "M."