Casks, barrels, or drums in their entirety

Official title: {Casks, barrels, or drums in their entirety, e.g. beer barrels, i.e. presenting most of the following features like rolling beads, double walls, reinforcing and supporting beads for end walls (thermally insulated barrels, B65D81/3802)}

B65D7/045 (Casks, barrels, or drums in their entirety) appears on 81 US grants and 69 published applications in this corpus.