Google was recently granted with a new collection of patents. One of the copyrights awarded to the tech giant was its proposal to utilize an eye-tracking technology that could establish a pay-per-gaze advertising system.

The details of the patent showed a Google Glass-like gadget that could register when a person looks at an advertisement. Also, the technology could detect data about the users' emotional state through the measurement of their pupil dilation. The patent was filed two years ago but was only signed over to Google last week.

"Under a pay per gaze advertising scheme advertisers are charged based upon whether a user actually viewed their advertisement," written information about the patent said. "Pay per gaze advertising need not be limited to on-line advertisements, but rather can be extended to conventional advertisement media including billboards, magazines, newspapers, and other forms of conventional print media."

In April 2013, Google noted in its public policy blog that patent assertion entities could cost the US corporations USD30 billion per year. The figure would further represent a loss by driving away legal challenges from firms that continuously fail to make anything but just want to be paid to cease lawsuits. Also, when Google purchased Motorola Mobility for USD12.5 billion, the net purchase cost for 17,000 patents was around USD2.85 billion. Each patent was worth USD167,647.