Abstract: A game ball comprising a spherical core and two-piece cover. The cover includes two figure eight-shaped pieces adhesively attached to the core. Furthermore, each figure eight-shaped piece may be separately stitched around the edges, given the appearance of a stitched ball once the cover pieces are in place. Preferably, the stitching pattern is a traditional herringbone pattern. Also provided is a process for making a game ball. This process comprises providing a spherical core and cover material comprising two stitched figure eight-shaped pieces. The stitched figure eight-shaped pieces are placed around the core using an adhesive.

Abstract: A bat having a non-uniform circumferential wall thickness. The bat comprises a tubular body having a handle portion, a tapered mid-section and a barrel or impact portion. In one embodiment, the outer diameter of the bat is constant, while the inner diameter varies between a maximum diameter and a minimum diameter to create alternating points of maximum wall thickness and minimum wall thickness. In an alternate embodiment, the inner diameter of the bat remains constant, while the outer diameter varies to create alternating points of maximum and minimum wall thickness. The distance between points of maximum and minimum wall thickness is such that there are at least two points of maximum wall thickness under the area of the bat that is contacted by a ball upon impact.

Abstract: A bat having a non-uniform circumferential wall thickness. The bat comprises a tubular body having a handle portion, a tapered mid-section and a barrel or impact portion. In one embodiment, the outer diameter of the bat is constant, while the inner diameter varies between a maximum diameter and a minimum diameter to create alternating points of maximum wall thickness and minimum wall thickness. In an alternate embodiment, the inner diameter of the bat remains constant, while the outer diameter varies to create alternating points of maximum and minimum wall thickness. The distance between points of maximum and minimum wall thickness is such that there are at least two points of maximum wall thickness under the area of the bat that is contacted by a ball upon impact. Further, the minimum wall thickness is selected so that the average wall thickness under the area of impact does not fall below the thickness required to resist denting.

Abstract: A tuned high performance sporting device comprising stiffened portions and flexible portions is taught. The invention is particularly well suited to ball bats. One embodiment of the ball bat includes a hollow tube having an impact portion, a handle portion and a tapered mid-section connecting the two. A core having a substantially hollow interior and an outer diameter, preferably at least as large as the impact portion inner diameter is located in the impact portion of the ball bat. A fill material is located in the core interior to connect the core to the interior of the impact portion. Methods of manufacturing and utilizing these tuned devices are also disclosed.