85402418
Aug 19, 2011
Oct 9, 2012
Acceleration sensors for use with helmets, such as sports helmet, helmet for dangerous work activities, recreational activities, or transportation; sensors for sports player location and tracking, time on ice or field, sports player performance and involvement; protective helmet sensors for measuring the speed, location and point of impact of the helmet worn by a person such as a sports helmet, helmet for dangerous work activities, recreational activities or transportation
Electrical and Scientific Apparatus