Agricultural machinery and attachments therefor, namely, rotary mowers, box scrapers, and three-point attachments; Agricultural machinery and attachments, namely, fertilizer spreaders; Agricultural machinery, namely, combines; Agricultural machinery, namely, harvesters; Agricultural machinery, namely, threshers; Agricultural machinery, namely, tillers; Agricultural machinery, namely, windrowers; Alternators; Bicycle assembling machines; Chain saws; Internal combustion engine parts, namely, heads; Internal combustion engine parts, namely, piston rings; Internal combustion engine parts, namely, pistons; Internal combustion engines for boats; Internal combustion engines for machine operation and replacement parts therefor; Internal combustion engines for power generation, other than for land vehicles; Internal combustion engines land vehicle parts, namely, coils; Internal combustion engines land vehicle parts, namely, distributor caps; Internal combustion engines land vehicle parts, namely, distributor rotors; Internal combustion land vehicle engine parts, namely, connecting rods; Lawn mowers; Rammers being machines; AC generators; Enhancement parts for internal combustion engines in the nature of fuel treatment devices; Enhancement parts for internal combustion engines, namely, fuel catalysts; Fuel and air mixture regulators being parts of internal combustion engines; Gaskets for internal combustion engines; Ignition parts for internal combustion engines, namely, condensers; Ignitions parts for internal combustion engines, namely, points; Intake manifolds for internal combustion engines; Motorized cultivators; Mounting brackets adapted for exhaust systems for internal combustion engines; Mounting fasteners adapted for exhaust systems for internal combustion engines; Mounting hangers adapted for exhaust systems for internal combustion engines; Nitrogen oxide traps for exhaust systems being parts of internal combustion engines; Particulate air filters for exhaust systems for internal combustion engines; Power-operated sprayers; Self-lubricating mechanical friction parts, especially of composite materials, namely, wear rings, washers, bushings, spherical bearings, bearing pads, sliding blocks and machine transmission gears all for load bearing machines, conveyors, handling trucks and machines, lifting machines, agricultural machinery, construction equipment machines and hydraulic turbines; Sparking plugs for internal combustion engines