A headrest is made from a blow-molded plastic body which has a re-entrant formation over part of its surface, the fixings for securing the body to the headrest support being located inside the re-entrant formation, and the walls of the formation cooperating with the support to define the limits between...http://www.google.sh/patents/US5316372?utm_source=gb-gplus-sharePatent US5316372 - Headrest for a motor vehicle
