It turns out Google does not have a single editorial policy on trademarks, but a different one in each country. The gist of the situation is this. Google's own general position on trademarks is that keywords can be used to trigger anyone's ad copy AND be used in ad copy, whether or not they are trademarked. This is consistent with the trademark laws of some countries, and in those countries the advertiser can bid on any keywords and use them in ads. Nevertheless, even in those countries, the trademark holder may file a specific exception request with Google. In that case, other advertisers can still use the keyword to trigger ads, but the trademarked keyword may not be used in the ad copy itself within the same industry. To the best of my understanding, this describes the situation in the USA. Trademark policies in France are, by contrast, more rigorous: there are laws against using others' trademarks in any fashion in PPC campaigns. But in most regions, Google itself does not disable your account or your keywords for trademark use.
I didn't find the right solution from the Internet.
References
http://forums.seochat.com/google-adword ... 67182.html