Despite the current intense legislative debate about patent reform, most business people and IP lawyers can agree that the American intellectual property system is one of the most robust in the world. Its legal protections create a fertile environment for innovation and new business growth-and litigation. But it isn’t just for Americans.

That’s why this year we’ve departed from our traditional survey of “Who Protects IP America” to show which U.S. law firms are prosecuting patents and pursuing IP litigation in the United States for the most innovative companies in the world. In years past, we have surveyed the Fortune 250 list of domestic companies, asking in-house counsel to name their top IP firms. This year we are using a list of “The World’s 50 Most Innovative Companies” compiled by BusinessWeek and the Boston Consulting Group, and using public data to identify the law firms.