Air cleaning units containing an air filter, ultraviolet lights and a photocatalytic filter; Air filters for air conditioning units; Air filters for domestic use; Air filters for industrial installations; Color filters for use in lighting instruments; Coolant recovery systems, comprising filters; Dripper irrigation systems, comprised of filters; Filtering units for aquariums; Filters for photographic, cinematographic, video and performing arts lighting; Filters made of fiber for water filtrat...