Air filtering units; Air filters for air conditioners in vehicle passenger compartments; Air filters for heating and cooling registers; Aquarium filters; Coolant recovery systems, comprising reservoirs, pumps, filters, cleaners; Dripper irrigation systems, comprised of valves, filters and regulators; External ballast and bilge water filtering and absorbing device for use in a local containment area for removing aquatic nonindigenous species, oil and other contaminants from the effluent; Exter...