Facebook claims trademark on the words 'face,' 'book,' 'wall' and 'poke.'

Facebook is using its user agreement to assert trademarks on a list of very common English-language words. A newly revised user agreement says:

"You will not use our copyrights or trademarks (including Facebook, the Facebook and F Logos, FB, Face, Poke, Book and Wall), or any confusingly similar marks, except as expressly permitted by our Brand Usage Guidelines or with our prior written permission."

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