A therapeutic bench for extending the thoracic cage and cervical areas of the body, comprising an elongated, horizontal support, a shorter thoracic cage support thereon, the bench being made to support only the sternum and chin with arms and head unsupported when a person sits on the support and lies...http://www.google.fr/patents/US4559930?utm_source=gb-gplus-shareBrevet US4559930 - Thoracic bench
