The one legged fastener is for securing an object to a wall. The one legged fastener has a body with one leg which has a prebent knee that permits the leg to be easily inserted through a desired hole in the wall. The fastener body is made of a bendable material and has a tab portion and a foot portion...http://www.google.de/patents/US4453869?utm_source=gb-gplus-sharePatent US4453869 - Fastener technology
