Racing vehicle position indication system and method

Radio frequency identification (RFID) pin detection system

Record measurement method and system using radio frequency...

Refereeing aid system for ball games

Score keeping display apparatus

Scoring system for athletic events

Scratchable conductive latex document scanner

Simultaneous bidirectional timing display

Ski stress signaling device

Sound generating device for jogger

Sporting game time-out indicator

Sports monitoring and tracking system

Sports timing system

Switch closure responsive logic signal generation means

System and method for monitoring a competitive activity

System and method for tracking identity movement and...

System for instantaneously displaying the ranking of a competito

System for selective detection and indication of impacts upon a

Tennis court boundary sensor

Timekeeping arrangement for sporting competitions