clipped from: www.washingtonpost.com Online retailer Amazon.com has sued Silver Spring-based Discovery Communications for infringing on patents related to product searches on its shopping Web sites, escalating a legal battle that began in March when Discovery claimed that its inventions were used in Amazon's Kindle book readers.
In a lawsuit filed Friday in Seattle, Amazon said Discovery's online store violated four patents that allow consumers to narrow searches for products or receive recommendations based on previous purchases. Amazon is seeking a court order to prevent Discovery from continuing to use the patents, as well as cash compensation for prior use.