Dean Kamen is a self-taught physicist, multimillionaire entrepreneur, and—with his 440 patents and National Medal of Technology—one of the greatest DIY innovators of our time. Like most DIY-ers, Kamen loves solving problems. Back in the 1970s, while he was still in college, Kamen’s brother (then a medical student and now a renowned pediatric oncologist) mentioned there was no reliable way to give babies small and steady doses of drugs. Without such technology, infants were stuck with extended hospital stays, and nurses were stuck with inflexible time schedules.