Filters [parts of machines or engines]; oil filters, fuel filters, filters for motors and engines, filters for machines; filters for cleaning cooling air, for engines; oil filters for motors and engines; air filters for automobile engines.

Parts of machines or engines, namely, compressed air and gas filters for compressed air and gas pipes and lines; engine air filters; gas turbine inlet filters for power generation and utilities; oil filters for motors, engines and industrial equipment

Filters as parts of machines or engines, filters for cleaning and cooling air for engines, filtering machines, filter presses

[ BUILDING BOARDS, ESPECIALLY ACOUSTIC BOARDS AND TILES OF METAL FOR CEILINGS AND WALLS ]

devices for audio transmission and reception consisting of transmitters, wireless transmitters, pocket transmitters, [microphones, electroacoustic transducers,] receivers, pocket receivers, wireless receivers, and parts therefor