oxygen generators for cleaning air, namely, air purifying apparatus; air cleaners for industrial purpose; air purifiers for automobiles; ionizing apparatus for the treatment of air used with air cleaning units; air cleaning apparatus; electric air cleaner in the nature of electric air sterilizer and air purifier; wearable air purifiers; portable air cleaners for household use; household air cleaners; air purifiers for strollers; air filters for air cleaners in the nature of air filtering unit...