This document summarizes the history and growth of E Ink, a company that developed electronic ink displays. It describes how E Ink struggled for years to commercialize its technology, facing many technical challenges. After launching in 2007, E Ink's sales grew 90% in 2007 and 140% in 2008 as the Kindle e-reader gained popularity. High-profile endorsements from Oprah and technology reviewers in 2008-2009 further fueled growth. E Ink's sales increased 300% in 2009 to over $160 million and the company was profitable, culminating in its sale for $450 million at the end of that year.