Air cleaners in the nature of air filters for engines; blowing machines for the compression, exhaustion and transport of gases; blowing machines and fans for the compression, sucking and carrying of grain; pneumatic transporters; centrifugal machines; blowing machines for the compression, exhaustion and transport of gases for industrial purposes; air suction machines for industrial purposes; axles for machines; anti-friction bearings for machines; speed governors for machines, engines and mot...