African American Inventors

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Across
  1. 2. Invented the modern day letter box
  2. 3. Developed a system of crop rotation and invented multiple uses for plants including peanuts
  3. 4. Invented Laser Eye Surgery for people with cataracts
  4. 7. Invented the first steam engine
  5. 10. Invented Supersoaker toy
  6. 11. Holds 3 of IBM original 9 patents for the computer, including technology that made color monitors possible and accessible
  7. 13. Invented the technology used in 90% of the world's microphones
Down
  1. 1. Invented the CCTV home security system
  2. 5. Invented heart pacemaker
  3. 6. Oversaw the installation of electric lights in New York, London, other cities and improved the lightbulb
  4. 7. Invented the modern day ironing board
  5. 8. Invented folding cabinet bed
  6. 9. His inventions improved the sewing machine, traffic lights and more
  7. 12. Invented Blood Plasma Bank