According to the dates recorded on this venerable document, the mighty Huret Svelto was first introduced in 1963 and first imported into the US that very year. The gear-side spokes on American rear wheels never knew what hit them.

• Publisher: US Patent and Trademark Office
• Inventor: Huret et ses Fils
• Country: USA
• Date: First use February 1963
• Derailleur brands: Huret
• Derailleurs: Huret Svelto (1st style)