US Patent 7238920 Modular bat warming system

Disclosed is a baseball and/or softball bat warmer system. Each individual bat heater includes an elongated outer tubular member having a closed bottom surface. An inner tubular member is spaced inwardly from the outer tubular member forming a space therebetween. A radiation type heating element is positioned between the inner and outer members so that it extends around the barrel portion of the bat for even heating thereof. The system also utilizes a heat seal positioned on the upper portion of the outer tubular member to protect the handle and grip portion of the bat from excessive heat.