Filters for machines and engines; filters being parts of engines and machines; filtering machines; air filters for engines; air filters being parts of engines and machines; apparatus (machines) for filtering dust; filters for dust for use with internal combustion engines; components, parts and accessories included in this class for all the foregoing items

Air filtering apparatus; air conditioning apparatus; air conditioning filters; ventilation apparatus; air filtration machines; portable filtration apparatus for filtering air (other than machines); dust exhausters; dust filters; apparatus for filtering dust; components, parts and accessories included in this class for all the foregoing items