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Top 100 Famous Female Inventors in History & Modern Women Inventors
her numerous inventions. During the 1930s and 1940s, Henry shifted her focus to improving existing machines such as typewriters. Among her patents was one for a protograph, a typewriter that created up to
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Top 101 Black Inventors & African American's Best Invention Ideas that Changed The World
Frederick McKinley Jones found work as a movie projectionist and a mechanic. Jones’ natural gift for machines and mechanics led him to invent the first sound synchronization device for motion pictures. His
inventions
new products
product design and development