A ball bat exhibits improved barrel performance in regions located away from the “sweet spot” of the bat barrel, as a result of strategic placement of interface shear control zones (“ISCZs”) in the barrel. The ball bat includes a barrel having a first region adjacent to the tapered section of...http://www.google.co.uk/patents/US7361107?utm_source=gb-gplus-sharePatent US7361107 - Ball bat exhibiting optimized performance via selective placement of interlaminar shear control zones
