This invention relates to a pressure sock and more particularly, but not exclusively, to a pressure sock for use in improving blood circulation in the lower legs of passengers during aeroplane flights. The pressure sock includes a inflatable bladder attachable to a least part of a bodily extremity such...http://www.google.fr/patents/US20040158285?utm_source=gb-gplus-shareBrevet US20040158285 - Pressure sock
