Air filtering installations; Air filters for air conditioning units; Air filters for domestic use; Air filters for industrial installations; Central air-conditioning installations; Fibrous filtering media for general industrial use in the purification of air and industrial fluids; Filters and filtering devices for air and gas conditioning; Filters for air conditioning; Industrial air filter machines; Industrial air purifiers; Industrial apparatus using air for drying and cleaning components i...

WIRELESS MICROPHONES, AUTOMATIC ACOUSTICAL FEEDBACK CONTROLLERS, ELECTRONIC FEEDBACK CONTROLLERS, ELECTRONIC EQUALIZERS, ELECTRONIC EQUALIZER/FEEDBACK CONTROLLERS FOR USE IN CONNECTION WITH THE REPRODUCTION AND DISTRIBUTION OF AUDIO SIGNALS, DIGITAL SIGNAL PROCESSORS