1893 - Thomas Edison received two U.S. patents. The first was for a "Cut Out for Incandescent Electric Lamps" and another for a "Stop Device" (No. 491,992-3). Also No. 492,150 for "Process of Coating Conductors for Incandescent Lamps."
... is the Content Scrambling System (CSS) employed by the DVD Consortium[?] on movie DVD disks. The data on the DVD is encrypted so that it can only be decoded and viewed using ...