[jevin]

Oh, thanks for the heads up. I wonder if this applies to us, since we're not a US based company.

[aspidistra]

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

and the OHIM website, which as I understand it covers Europe-wide trademarks:

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...

[jevin]

Of course, I'll have that checked out! ;-)

[anigbrowl]

You don't want to pay the ton of money it will take to have that question answered by a court. Change the name - it's demoralizing and embarrassing, but way way cheaper than trademark litigation.