1
perchlorates for use in oxygen generation, percarbonates for use in oxygen generation, calcium hydroxides for use in carbon dioxide removal, chemical preparations to prevent mildew, deodorizers for industrial purposes, gas purifying preparations for industrial scrubbers, gas absorbents for use in carbon dioxide removal, toxic gas neutralizers for use in industrial scrubbers, chemical test papers for use in industrial safety
11
gas scrubbers for industrial use, air sterilizers for industrial use, air purifying apparatus and machines for industrial use, air conditioners for home use, ornamental fountains for office use, ventilation machines and apparatus for home use, ventilation installations comprised of chemical filters for aircraft, disinfectant dispensers for rinsing lavatories, water purifiers for household purposes, aquarium filtration apparatus and heaters