A method and apparatus for neutralizing odor of human evacuation into a toilet facility by dispensing a deodorant liquid dropwise into the toilet facility comprising storing an odor-neutralizing liquid in an inner container and supporting the inner container in an outer container. An outlet is provided...http://www.google.fr/patents/US4633533?utm_source=gb-gplus-shareBrevet US4633533 - Method and article for neutralizing offensive odors
Method and article for neutralizing offensive odors
