06151563 is referenced by 111 patents and cites 7 patents.

A device for measuring a movable object, such as a baseball, football, hockey puck, soccer ball, tennis ball, bowling 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 has a spin detection circuit, electronic processor circuit, magnetic field sensor circuit, and a radio transmitter. The other part of the device, called the monitor unit, is held or worn by the user and serves as the user interface for the device. The monitor unit has a radio receiver, a processor, an input keypad, and an output display that shows the various measured motion characteristics of the movable object, such as the time of flight, speed, trajectory height, spin rate, or curve of the movable object, and allows the user to input data to the device.

Title
Speed, spin rate, and curve measuring device using magnetic field sensors
Application Number
7241
Publication Number
6151563
Application Date
September 15, 1999
Publication Date
November 21, 2000
Inventor
David J Marinelli
Superior
CO, US
Agent
James R Young
Assignee
Silicon Pie
CO, US
IPC
G06F 15/00
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