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Joe Grand—often known by his hacker handle “Kingpin”—is an American electrical engineer, inventor, and hardware hacker recognized for his expertise in electronics and product design. A former member of the influential hacker collective L0pht Heavy Industries, he has dedicated his career to exploring hardware security, reverse engineering, and innovative prototyping. Joe hosted the Discovery Channel show Prototype This! and founded Grand Idea Studio, where he continues to develop new products and educate others on the art of hardware hacking.