Famous Inventors

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Across
  1. 4. - Printing
  2. 5. - Steam engine
  3. 10. - Lightbulb
  4. 11. - iPhone
  5. 12. - Assembly line
  6. 14. - Vaccine
  7. 15. - Computer
  8. 17. - Telegraph
  9. 19. - Airplane
Down
  1. 1. - Sewing machine
  2. 2. - Radio
  3. 3. - Hydrofoil
  4. 6. - Alternating Current
  5. 7. - COBOL
  6. 8. - Radium
  7. 9. - Dynamite
  8. 12. - Electricity
  9. 13. - Helicopter
  10. 16. - Telephone
  11. 18. - Cotton gin