A seating device is disclosed that offers comfort in use over extended periods of time and certain therapeutic effects as well as being readily portable and storable when not in use. The device is embodied in an inflatable seat that may be molded from thin, clear polyethylene/vinyl plastic material and...http://www.google.co.uk/patents/US5490717?utm_source=gb-gplus-sharePatent US5490717 - Lotus seat
