Shimano’s Dura-Ace groupset was created for the US market - see how the ‘first use’ and ‘in commerce’ dates are the same - indicating that the first use of this trademark was in the US.

I love the angular typeface - which looks good even today. Time for a come-back.

• Publisher: US Patent and Trademark Office
• Inventor: Shimano Industrial Co. Ltd
• Country: USA
• Date: First use April 1972
• Derailleur brands: Shimano
• Derailleurs: Shimano Dura-Ace