Its not just the US. A man in Australia once patented a "circular transportation facilitation device", yes a wheel! http://edition.cnn.com/2001/WORLD/asiapcf/a

Its not just the US. A man in Australia once patented a "circular transportation facilitation device", yes a wheel! http://edition.cnn.com/2001/WORLD/asiapcf/auspac/07/02/australia.wheel/ http://edition.cnn.com/2001/WORLD/asiapcf/auspac/07/02/austr...