Inventions

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Across
  1. 2. invented by Thomas Edison to generate light
  2. 5. this special code was named after its inventor
  3. 6. invented by Ben Franklin after he became tired of wearing two pairs of glasses
  4. 7. Isaac Merrit Singer invented this machine
Down
  1. 1. Walter Diemer invented this type of pink chewing candy
  2. 3. Orville and Wilbur Wright invented this flying device
  3. 4. Levi Strauss invented these rugged trousers