This patent, from 2000, describes the Falcon Volante, a Taiwanese development of the 1993 SunTour SX-100. It is a horizontal parallelogram design that mounts on the rear dropout but sits under the chainstay.

• Publisher: Taiwan Intellectual Property Office
• Inventor: De-Huei Jang
• Country: Taiwan
• Date: Priority date March 2000
• Derailleur brands: Falcon
• Derailleurs: Falcon Volante