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At 16, Osbourn Dorsey opened the door for all of us - The Black Wall Street Times

Retrieved on: 2023-09-15 20:34:36

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Osbourn Dorsey used cast iron instead of wood or metal ... In 1878, he patented the doorknob and doorstop. His invention was a major improvement over ...

Article found on: theblackwallsttimes.com

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