engineers – early 1900s

Garrett Morgan, African American innovator, invented the three-positioned traffic light
  • Garrett Morgan — The Gas Mask, Hair Straightener, Traffic Signal and More – Garrett Morgan only had an elementary school education, yet he is one of the most prolific inventors of his time, credited with the invention of gas masks, hair straighteners, modern traffic signals and more. His patented “breathing machine” led to the prototype of the gas masks used in World War I — equipment that saved countless lives during toxic gas warfare.

That’s engineering

  • invention – a new and useful device, method, or process developed from study and experimentation

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