A bag mounted with casters has a bag body attached to a base frame mounted with the casters at four corners of a bottom surface thereof. The base frame includes a loading table, and vertically extensible rods with a grip mounted at upper ends thereof. The extensible rods are fixed on one side of the...http://www.google.com/patents/US7165661?utm_source=gb-gplus-sharePatent US7165661 - Bag mounted with casters
