Even after presented on an American TV, the Project Glass of the search giant Google still remains a mystery. However, with the disclosure record of a patent may be prototypes of the device, it is possible to have an idea of how Google's glasses should work. The file specifies a kind of touchpad moves sideways for the basic functions of the device.According to the image, we can see the controls to scroll pages, emails and forward and backward a few others.
The patent was registered in May 2011, but was only recently released on the internet. A year after that, the chief technology officer of Google, Sergey Brin, was on the TV showing a prototype of the Project Glass apparently already had the functions in question.
The expectation is that the final product to be launched during 2013. However, we cannot verify the date neither we can provide any more info about it right now.