BLACK HIS­TORY IN­VEN­TORS

Chattanooga Times Free Press - ChattanoogaNow - - OUT & ABOUT -

1. Who in­vented the lawn mower? 2. Who in­vented three-way traf­fic lights? 3. Who patented a coin- chang­ing ma­chine in 1970? 4. Who in­vented the fire ex­tin­guisher? 5. Who in­vented the fire es­cape lad­der?

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