useful invention

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Across
  1. 2. charles babbage
  2. 4. percy l spencer
  3. 5. richard gurley drew
  4. 8. mary anderson
  5. 10. stephen perry bobstein
Down
  1. 1. lewis e waterman
  2. 3. marion donovan
  3. 6. johan edvard lanndstrom
  4. 7. walter hunt
  5. 9. thomas edison