US Patent # 2,108,941 - Morgan

US Patent 2,108,941 - Morgan Helical main image

The most important derailleur ever to come out of the Principality...

  • Publisher: US Patent and Trademark Office
  • Inventor: Joseph Morgan
  • Country: USA
  • Date: US application filed March 1937, British application filed April 1936
  • Derailleurs: Morgan Helical derailleur
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