As with many of the trademarks registered to Taiwanese companies, I was surprised at how early the dates were for this abandoned application - ‘first use’ and first use ‘in commerce’ 1977.

Interesting spelling of Deraillfur. Perhaps it describes the grease caked fibres that mysteriously wrap themselves around your pulley wheels.

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• Publisher: US Patent and Trademark Office
• Inventor: Falcon-Derailleur Co. Ltd.
• Country: USA
• Date: First use February 1977
• Derailleur brands: Falcon
• Derailleurs: nothing specific