IANAL, but I was also able to find Knol from Google on the UK IPO search: http://www.ipo.gov.uk/tmcase/Results/4/EU006911796 http://www.ipo.gov.uk/tmcase/Resul

IANAL, but I was also able to find Knol from Google on the UK IPO search: http://www.ipo.gov.uk/tmcase/Results/4/EU006911796 http://www.ipo.gov.uk/tmcase/Results/4/EU006911796 and the OHIM website, which as I understand it covers Europe-wide trademarks: https://oami.europa.eu/eSearch/#details/trademarks/006911796 https://oami.europa.eu/eSearch/#details/trademarks/006911796 But like I said, I am not a lawyer, do your own research, consult an expert etc etc...