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Robert_Charlton - 2:32 am on Apr 17, 2007 (gmt 0)
The most detailed article about meta tag lawsuits I've seen is in Danny Sullivan's SearchEngineWatch article of about 3 years ago... Meta Tag Lawsuits [searchenginewatch.com]
If your trademark appears in Google via your competitors' title element (which is not a meta tag), or in the meta description returned on a Google search, that might be a different situation than if it were used in the meta keywords (which are not visible to users and don't effect Google rankings).