Cleanliness of surface in such as hospital and farm building, is checked by person wearing footwear with impregnation pad on underside for contacting surface

摘要

The cleanliness of a surface is checked by a person wearing footwear carrying on its underside a removable impregnation pad for contacting the surface. An Independent claim is also included for equipment for perfuming the surfaces, footwear, the pad and a hermetically sealable container for them.