water sterilizers for household purposes; toilet bowls; toilet seats; bidets; showers; shower enclosures; wash-hand basins being parts of sanitary installations; washstands being parts of sanitary installations; hand drying apparatus for washrooms in the nature of electric hot air hand dryers; toilet stool units with a washing water squirter; water taps in the nature of faucets; ventilators for bathroom; bath tubs; urinals being sanitary fixtures; pipes for toilets and urinal receptacles being parts of sanitary facilities; electric lighting apparatus; prefabricated bathrooms in the nature of shower surrounds, toilets, and bathroom sinks, all sold as a unit; lighting apparatus and installations; disinfectant dispensers for toilets; ventilators for household use; air sterilizers for household purposes; household air cleaner not being parts of machines; humidifiers for household purposes