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Kettering Inventions * Electric cash register * Electric auto ignition and self-starter for automobiles first appeared on the 1912 Cadillac. Within a few years, Delco produced a complete starting, ignition and lighting system that is credited with the phenomenal rise of the automobile industry. * Spark plug * Freon for refrigerators and air conditioners. Ridgeleigh Terrace, Kettering's residence in Dayton, was the first air conditioned home in America. * Leaded gasoline * Quick drying paint for automobiles * Safety glass * Portable electric generator * Four-wheel brakes * Automatic transmission * Electric railway gate * First synthetic aviation fuel

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