The present invention discloses a portable shelf including a pair of shelf plates each having two folding members pivotally connected with each other by inner edges, a pair of side frames pivotally connecting the two plates to form a rectangular body, and a folding arrangement including two connecting...http://www.google.fr/patents/US7389887?utm_source=gb-gplus-shareBrevet US7389887 - Portable foldable shelf
