A list of Trademarks relating to the OUYA brand:
https://trademarks.ipo.gov.uk/ipo-tmcase/page/Results/23/WE00001290067
https://trademarks.ipo.gov.uk/ipo-tmcase/page/Results/23/WE00001149284
http://tmsearch.uspto.gov/bin/showfield?f=doc&state=4802:ja3id6.2.2
http://tmsearch.uspto.gov/bin/showfield?f=doc&state=4802:ja3id6.2.1