Black Inventors: Use their last names only. Do not capitalize.

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Across
  1. 3. fountain pen
  2. 4. spark plug
  3. 6. potatoe chips
  4. 8. street sweeper
  5. 10. sprinkler system
  6. 13. telegraph
  7. 15. hair products
  8. 16. video games
  9. 17. gear shift
  10. 18. lock
  11. 19. refrigerator
  12. 20. ice cream scooper
  13. 21. air conditioner
  14. 22. clothes dryer
Down
  1. 1. pencil sharpener
  2. 2. joiners clamp
  3. 5. toilet
  4. 7. elevator door
  5. 9. clock
  6. 11. hair brush
  7. 12. mobile phone
  8. 14. doorknob
  9. 15. peanut products
  10. 16. light bulb filament
  11. 23. traffic light