There are at least ten US trademarks filed by Campagnolo on this site - and this is my favourite. I also suspect that it was one of Tullio’s favourites, as the winged wheel theme appears again and again and I suspect that, secretly, his first love was his design for the quick-release. I particularly like the luxuriously medieval treatment of the feathers.

• Publisher: US Patent and Trademark Office
• Inventor: Tullio Campagnolo
• Country: USA
• Date: First use 1948
• Derailleur brands: Campagnolo
• Derailleurs: nothing specific