On this day in 1887, Elijah McCoy, a prolific African American inventor, was granted U.S. Patent No. 363,529 for a Lubricator for Steam-Engine Safety Valves. This innovation improved the efficiency and safety of steam engines by ensuring consistent lubrication under high-pressure conditions—a critical advancement in railway and industrial machinery. McCoy’s reputation for high-quality inventions gave rise to the phrase “the real McCoy”, symbolizing authenticity and excellence.
© 2025 KnowThyHistory.com. Know Thy History
