famous inventers

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Across
  1. 4. rubber
  2. 6. printing press
  3. 9. apple
  4. 10. peanut butter
  5. 12. alternating current
  6. 13. lightning rod
Down
  1. 1. model-T
  2. 2. traffic signal
  3. 3. parachute
  4. 5. engine
  5. 7. telegraph
  6. 8. telephone
  7. 11. light bulb