Can you name the year of issue for these US Patent numbers?

created by Juvo415
  • Enter a year in the box below
  • Correctly named years will show up below
  • Answers MUST be guessed in order
  • Some wrong answers will appear in red
  • See if you can guess what year these patents were issued.
  • This quiz has not been verified by Sporcle
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Year by Patent Number Quiz

  1. by Juvo415
  • Created Nov 16, 2011 in History
  • Game Plays 18

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