An apparatus for recording foot, hoof and paw impressions is disclosed. An impression member is atop a foundation member, both of which are concealed by a removable protective cover. The impression member records the shape of a foot, hoof or paw which steps upon the apparatus, while the cover resists...http://www.google.es/patents/US7341509?utm_source=gb-gplus-sharePatente US7341509 - Foot impression recording apparatus
