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Three-wheeled scooter
The Wayback Machine - https://web.archive.org/web/20071230054615/http://www.wipo.int:80/pct/en/inventions/three_wheeled_scooter/

PCT Notable Inventions:   Three-wheeled Scooter

A three-wheeled scooter, developed by Trikke Tech Inc., uses the rocking and rolling motions of a rider to propel itself forward.  No pushing or pedalling required.

Chosen as one of Time Magazine's "coolest inventions of 2002."

Three-wheeled Scooter
Image: Three-wheeled scooter
PCT Application:
Selection of references:
Links: Official Trikke Tech Inc. web site