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."
... of mazes without touching the walls - but it rotates all the time, making the task difficult. The player controls the direction and speed of movement (it's a 3-speed ...