We have some somber news to bring you today: Charles Walton, the man who pioneered the rise of RFID technology, has died at the age of 89. The Cornell-educated entrepreneur garnered more than 50 patents over the course of his career, but it only took one to cement his legacy -- a 1973 patent for a "Portable radio frequency emitting identifier." It may not have been the first RFID-related invention, but Walton's breakthroug