A South Korean patent filing, complete with memos and device designs has let the cat out of the bag about Samsung's new head-mounted wearable device to compete with Google Glass, two days after Microsoft was found to be testing a similar prototype. The device isn't wireless; in fact it has an attached USB extension to plug into and serve as an extension of a smartphone. The device is categorized as 'sports glasses' to 'take phone calls and listen to music during workouts.' The filing gives an overhead, front, and side view of the proposed device, another entry into the rapidly expanding and increasingly competitive wearables marketplace."