System and device for golf putting practice
System and facility for educating students concerning the...
System and method for basketball goal height adjustment
System and method for collecting and managing data
System and method for correcting golf swing using internet
System and method for measuring a golfer's ball...
System and method for measuring a golfer's ball...
System and method for quick release base for baseball and...
System and method for soccer net installation
System and method for training a golf club stroke
System and method of preparing a playing surface
System for adjusting archery bow and arrows
System for aligning a golfer's stance
System for altering the coefficient of friction between a golf c
System for assembly and leveling of playing surface for...
System for assembly and leveling of playing surface for...
System for confirming hit locations on tennis court boundaries
System for covering pool and billiards tables
System for custom fitting a golf club to a player
System for determining performance characteristics of a golf...