1
Dave Marinelli: Time of motion, speed, and trajectory height measuring device. Silicon Pie, James R Young, June 6, 2000: US06073086 (155 worldwide citation)

A device for measuring the time of flight, speed, and trajectory height of a projectile, such as a baseball, football, hockey puck, or model rocket, or the time and speed of swing of a movable object, such as a baseball bat or golf club. Part of the device, called the object unit, is embedded, secur ...


2
Dave Marinelli: Speed, spin rate, and curve measuring device. Silicon Pie, James R Young, November 14, 2000: US06148271 (139 worldwide citation)

A device for measuring a movable object, such as a baseball, football, hockey puck, soccer ball, tennis ball, or a golf ball. Part of the device, called the object unit, is embedded, secured, or attached to the movable object of interest, and consists of an accelerometer network, electronic processo ...



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