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African American Inventors

Across
Automated Shoemaking Machine Inventor
Real McCoy - Mechanical Engineer Lubricants
Wire precision resistor for radios, guidance systems and pacemaker
Filament in light bulb
Almanacs, astronomy, DC Planner
Chemical Engineer , Investor and Philanthropist
Blood Banks
Chemist - National Inventors Hall of Fame - synthesizer of medicinal drugs including cortisone, steroids and birth control pills
Gong Signal Chair or Flight Attendant Button
Down
Peanut Guy & Botanist
Street car Trolley Multiplex telegraph
Improved Hair Brush
Pioneer of Laser Cataract Surgery
Father of Gaming - Fairchild Channel F
3 position traffic light