How to save 10,000 fingers

Enlarge this image James Sneed/NPR

Table saws are extremely dangerous. The government estimates that injuries from table saws send something like 30,000 people to the emergency room every year. 3,000 of those end in amputations. The costs of those injuries are enormous. Are they also avoidable?

In 1999, inventor Steve Gass had a realization: Humans conduct electricity pretty well; Wood does not. Could he develop a saw that could tell the difference between the two?

Steve invented a saw that can detect a finger and stop the blade in milliseconds. Then, he tried to license it

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