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Arthur Atwater Kent Sr. was an American inventor and prominent radio manufacturer based in Philadelphia. In 1905, he invented the Unisparker which combined ignition points, condenser, centrifugal advance mechanism, and distributor in one unit, the system used in virtually every automobile until the development of fully electronic systems in the 1970s and '80s. In 1921, Kent patented the modern form of the automobile ignition coil.
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