As Google has grown into the world's most popular search engine and, arguably, the most powerful Internet company, it has become entangled in scores of lawsuits touching on a wide range of legal questions, including copyright violation, trademark infringement and its method of ranking Web sites. Any company that is large and successful is going to attract lawsuits, and Google's deep pockets make it an especially big target. But as it rushes to create innovative new services, Google sometimes operates in a way that almost seems to invite legal scrutiny.