Weird Patent of the Day
Deodorizing accessary for water closets
An improvement for toilet deodorizers, ventilators, and air fresheners that draw odorous air from the toilet bowl through the water tank overflow conduit. A normally-closed air valve impedes water vapor intrusion from the water tank when the accessory is not in use.
Source: United States Patent and Trademark Office, www.uspto.gov. Official PDF: USPTO patent PDF. Also at Google Patents. The drawing on this page is a reduced copy of the official figure; see the original drawing.
