Louis Camillis certainly did not waste too much of his hard-earned money on the graphic design of his trademark!

The claimed date of first use in Great Britain is January 1926, and the claimed date of first use in commerce with the US is 1930 - which is one of the earliest dates that I have seen for a derailleur in the USA.

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• Publisher: US Patent and Trademark Office
• Inventor: Cyclo Gear Company Ltd.
• Country: USA
• Date: First use January 1926
• Derailleur brands: Cyclo Gear Company
• Derailleurs: nothing specific