An anonymous reader writes Filed in 2008, published in 2013, and legally granted to Apple this week, the company's patent for a 'Head-mounted display apparatus for retaining a portable electronic device with display' could have "broad ramifications" for mobile VR headsets like Samsung's Gear VR and Google Cardboard, says patent attorney Eric Greenbaum. "This Apple HMD patent is significant. I would say it introduces potential litigation risks for companies that have or are planning to release a mobile device HMD," he said. "There is no duty for Apple to make or sell an HMD. They can sit on this patent and use it strategically either by enforcing it against potential infringers, licensing it, or using it as leverage in forming strategic partnerships."