Amazon Seeks Personal Search History Patent

theodp writes "The USPTO has published Amazon.com's patent application for Persistently storing and serving event data, which describes a9.com's personal search history feature and lists a9.com CEO Udi Manber as an inventor. Interestingly, claim 48 describes a user interface that responds to a user's request to "delete" his search history by rendering it "undisplayable" to him, but still leaving it accessible for other uses. When filed back in 2003, Amazon asked the USPTO not to publish the application, but rescinded that request last May, presumably in anticipation of its filing for an international patent."