Abstract: The invention discloses a method of making a game ball. The method comprises utilizing a mold to form a game ball section. The patterned surface is imprinted into the surface of the molded game ball section. The mold is utilized to create a plurality of grooves in the outer surface of the molded game ball section. The plurality of grooves creates a strength and resiliency in the molded game ball section. One or more molded game ball sections are combined edge to edge to create a final game ball. The mold used can be a male mold or a female mold. The molded game ball section can be made through vacuum forming, compression molding, or injection molding.

Abstract: The invention is directed toward a portable tennis racket stringing machine which utilizes an advanced string clamp and tensioning lever. The machine comprises a base, a mounting plate, and one or more string clamps. The mounting plate has a plurality of channels shaped for receiving one or more string clamp feet. The string clamp has one or more string clamp feet shaped for being inserted into the channels. The string clamp is secured to the machine on one side of the string bed and locks on the other side of the string bed. The lever comprises an external housing, a tension lever, a brake lever, and a tension spring. When the tension in the string is equal to or greater than the tension in the tension spring, the brake lever engages a brake which causes the lever to lock into its then current position.