Enhanced golf range play using RFID and GPS

Exercise monitoring device

Flagpole particularly for indicating goals in skiing competition

Golf course electronic safety device

Golf course play indicator devices

Golf score display device

Golf swing control alarm

Golfer's head motion sensor

High-efficiency apparatus for measuring operational parameters a

Hole in one alarm

Impact detection apparatus

Indoor/outdoor portable basketball scoreboard

Let-ball detectors

Live-action interactive adventure game

Long jump and triple jump foul detector system

Magnetically triggered on-board elapsed time indicator

Method and apparatus for alerting basketball fans of...

Method and apparatus for detecting illegal pitches

Method and apparatus for indicating a strike at bowling alley

Method and controller for providing a location-based game...