Ryno Motors

www,rynomotors.com/
www.rynomotors.wordpress.com/
www.youtube.com/user/rynomotors1

www.ecofriend.org/entry/ryno-motors-creates-one-wheel-motorcycle-prototype-for-police-use/
www.jeromedemers.com/blog/2010/08/rhino-motors-self-balancing-one-wheel-electric-scooter/

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www.kickstarter.com/projects/motopogo/moto-pogo-the-self-balancing-motorcycle
www.gizmag.com/moto-pogo-one-wheeled-self-balancing-scooter/38090/
www.motopogo.com

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Raptor by Nick Thatcher
www.thatch-industries.webs.com/
www.engadget.com/2012/12/16/homemade-raptor-unicycle-uses-an-arduino-to-keep-upright/

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The "Thing" with seat
Haotian
https://sites.google.com/site/onewheeledselfbalancing/
https://sites.google.com/site/onewheeledselfbalancing/Home/one-wheeled-scooter