This study covers the history of Sino-US trade relations with a particular focus on the past decade, during which time each has been a member of the World Trade Organization (WTO). Providing a brief history of 19th and 20th century economic relations, this paper examines in detail the trade disputes that have arisen between China and the United States over the past decade, giving dollar estimates for the trade flows at issue. Each country has partaken in their share of protectionist measures, however, US measures have been characteristically defensive, protecting declining industries, while Chinese measures have been characteristically offensive, promoting nascent industries. We also cover administrative and legislation actions within each country that have yet to be the subject of formal complaint at the WTO. This includes an original and comprehensive quantitative summary of US Section 337 intellectual property rights cases. While we view the frictions in Sino-US trade a logical consequence of the rapid increase in flows between the two countries, we caution that each country work within the WTO framework and respect any adverse decisions it delivers so that a protracted protectionist conflict does not emerge. We see the current currency battle as one potential catalyst for such conflict if US and Chinese policymakers fail to manage it judiciously.