Twitter's bid to trademark 'tweet' fails

Also from last Friday's Guardian: Twitter's bid to trademark 'tweet' fails

"The word "tweet" may have entered the international lexicon thanks to an explosion in 140-character microblogging messages, but an attempt by Twitter's founders to trademark it has been rejected.

Twitter applied to the US patent and trademark office last month for ownership of the word but the request was provisionally denied on the grounds that other companies had filed for trademarks of very similar words."