theodp writes "Google remembers Dr. Martin Luther King, Jr. not only with its Doodles, but also with its patents. 'Right around the Martin Luther King Holiday,' explained Google in its application for a recently-granted patent on Discovery of Short-Term and Emerging Trends in Computer Network Traffic, 'there may be many searches about "Martin Luther King"...Thus, it would be useful to have better methods of detecting short term trends for the purposes of caching search results to making them more readily available to users.' You may call the invention of detecting and caching 'MLK Day Sale' search results patently obvious, but the USPTO calls it U.S. Patent No. 8,082,342. Hey, at least it's arguably better than the patents issued to Microsoft and Google for avoiding walking or driving down Martin Luther King Boulevard!"