Owner Donaldson Company, Inc. a Delaware corporation

Service Spruson & Ferguson

Class 7 Mufflers and silencers for internal combustion engines; silencers for gas turbine engines; silencers 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, 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; air-oil separator having a coalescing element followed by an innertial separator; air intake caps and hoods for air filters for internal combustion engines; aircraft gyro filters; automatic self-cleaning mechanical dust filters for industrialapplications; and mechanical dust collectors and dust separators of an industrial nature for use in manufacturing process; air filters, oil filters and fuel filters for land vehicle engines; filters for engine air intake systems; lubricating oil filters for engines and transmissions and hydraulic systems; non-woven fibrous filter media for fluid filters used in vehicular engine transmission and hydraulic applications, for air filters used in engine air intakes, and for air filters used in industrial applications; mufflers, silencers and spark arrestors for land vehicles; and air filters for fixed wing airplanes and helicopters

Class 9 Air flow restriction indicators; filters for respiratory masks

Class 11 Air filters (not for scientific purposes and not being parts of engines, of motors or machines); air filters for industrial applications; oil filters (not being parts of lubrication systems of internal combustion engines); ventilation panel filters for industrial ventilation, ventilating and filtering installations to supply filtered clean air to enclosed rooms; air filtering installations for buildings and factories primarily comprising self-cleaning filter cartridge collectors; ventilation panel filters for vehicle operator cabs, for automobile passenger compartments, for air conditioners and for electronic equipment