Rosetta Stone Sues Competitor Over Google, Yahoo Ads

A maker of language software is suing a smaller competitor for alleged trademark violations in an effort to combat what it claims is "piggybacking," a practice in which companies use major players' brand names or other trademarked words in the text of search ads to lure Web surfers to their own sites. The case highlights a particular struggle for companies that rely heavily on the Internet for advertising and putting their brands before the public.