Inventions(last names only)

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Across
  1. 2. Cellular Phone
  2. 8. Alphabet(hieroglyphics)
  3. 9. Fly Landing Platform
  4. 10. Elevator
  5. 15. Dust Pan
  6. 16. Mop
  7. 17. Fountain Pen
  8. 20. Toliet System
  9. 22. Comb
  10. 24. guitar
  11. 26. Door Knob
  12. 27. Traffic Signal
  13. 28. Automatic transmission
  14. 29. Fire Extinguisher
  15. 30. The Blimp
  16. 31. Air conditioner
Down
  1. 1. sethoscope
  2. 3. Bicycle Frame
  3. 4. Pencil Sharpener
  4. 5. Folding Chair
  5. 6. Gas Stove(Range)
  6. 7. Ironing Board
  7. 11. refrigerator
  8. 12. Show Making Machine
  9. 13. LawnMower
  10. 14. Helicopter
  11. 18. Hair Brush
  12. 19. Heating Furnace
  13. 21. Letter(mail)Box
  14. 23. Clothes Dryer
  15. 25. Street Sweeper