MUFFLERS AND SILENCERS FOR INTERNAL COMBUSTION ENGINES; SILENCERS FOR GAS TURBINE ENGINES; SILENCERS FOR GENERATORS AND NOT FOR LAND VEHICLES; SPARK ARRESTORS FOR INTERNAL COMBUSTION ENGINES; CENTRIFUGAL PRE-CLEANERS AND AIR CLEANERS FOR INTERNAL COMBUSTION ENGINES AND GAS TURBINE ENGINES; DUST UNLOADER VALVES FOR CENTRIFUGAL AIR CLEANERS FOR USE WITH INTERNAL COMBUSTION ENGINES; CENTRIFUGAL-TYPE COOLANT CLARIFYING UNITS FOR GRINDING MACHINES; CENTRIFUGAL SEPARATORS FOR REMOVING PARTICLES FROM LIQUIDS IN CONTINUOUS FLOW; FILTERS BEING PARTS OF MACHINES; POROUS MEDIA AIR FILTERS AND PRE-SCREENERS FOR GAS TURBINE ENGINES AND INTERNAL COMBUSTION ENGINES; OIL BATH AIR CLEANERS FOR INTERNAL COMBUSTION ENGINES; MACHINE PARTS, NAMELY, AIR-OIL SEPARATOR HAVING A COALESCING ELEMENT FOLLOWED BY AN INTERNAL SEPARATOR; AIR INTAKE CAPS AND HOODS FOR AIR FILTERS FOR INTERNAL COMBUSTION ENGINES; AUTOMATIC SELF-CLEANING MECHANICAL DUST FILTERS FOR INDUSTRIAL APPLICATIONS, GAS TURBINES AND TANK ENGINES; MECHANICAL DUST COLLECTORS AND DUST SEPARATORS OF AN INDUSTRIAL NATURE FOR USE IN MANUFACTURING PROCESSES; MACHINE PARTS, NAMELY, OIL FILTERS (NOT BEING PARTS OF LUBRICATION SYSTEMS OF INTERNAL COMBUSTION ENGINES); AIR FILTERS, OIL FILTERS, AND FUEL FILTERS FOR LAND-VEHICLE ENGINES; FILTERS FOR ENGINE AIR-INTAKE SYSTEMS; LUBRICATING OIL FILTERS FOR ENGINES AND LAND-VEHICLE HYDRAULIC SYSTEMS; LUBRICATING OIL FILTERS FOR MACHINE TRANSMISSIONS; MUFFLERS, SILENCERS, AND SPARK ARRESTORS FOR LAND VEHICLES; AND AIR FILTERS FOR FIXED-WING AIRPLANES AND HELICOPTERS; FILTERS HAVING A NON-WOVEN FIBROUS FILTER MEDIA IN THE NATURE OF SYNTHETIC FIBERS OR TREATED PAPER, FOR AIR AND FLUID FILTERS USED IN VEHICULAR ENGINE, TRANSMISSION AND HYDRAULIC APPLICATIONS, INDUSTRIAL APPLICATIONS AND GAS TURBINES

AIR FLOW RESTRICTION INDICATORS AND AIRCRAFT GYRO FILTERS

AIR FILTERS (NOT FOR SCIENTIFIC PURPOSES AND NOT BEING PARTS OF ENGINES, OR MOTORS OR OF MACHINES) FOR COMPUTER DISC DRIVES; CHEMICAL VAPOR FILTERS CONTAINING CARBON FOR USE IN INDUSTRIAL GAS FILTRATION; AIR FILTERS AND HYDRAULIC FILTERS FOR INDUSTRIAL APPLICATIONS; VENTILATION PANEL FILTERS FOR INDUSTRIAL VENTILATION; VENTILATING AND FILTERING INSTALLATIONS CONSISTING OF A BLOWER, A FILTER AND A CONTROL SYSTEM TO SUPPLY FILTERED CLEAN AIR TO ENCLOSED ROOMS; AIR FILTERING INSTALLATIONS FOR BUILDINGS AND FACTORIES PRIMARILY CONSISTING OF SELF-CLEANING FILTER CARTRIDGE COLLECTORS; VENTILATION PANEL FILTERS FOR VEHICLE OPERATOR CABS, FOR AUTOMOBILE AND AIRCRAFT PASSENGER COMPARTMENTS, FOR AIR CONDITIONERS, AND FOR ELECTRONIC EQUIPMENT; AND AIR-OIL SEPARATORS HAVING A COALESCING ELEMENT FOLLOWED BY AN INTERNAL SEPARATOR, FOR USE IN LAND VEHICLES AND INDUSTRIAL APPLICATIONS

LUBRICATING AND OIL FUEL FILTERS FOR LAND VEHICLE TRANSMISSIONS