A tubular baseball bat comprising a substantially full length core shaft of preferably constant cross-section, including a handle portion, and a barrel with a gap or separation between the core shaft and barrel, the core shaft and barrel being connected at two or more locations. Embodiments include bats...http://www.google.co.uk/patents/US20060258490?utm_source=gb-gplus-sharePatent US20060258490 - TUBULAR BASEBALL BATS WITH FULL LENGTH CORE SHAFTS
