They do NOT own a sub-set of ONEV's patents. That is an INCORRECT claim. If it WERE a sub-set, then a resulting product AUTOMATICALLY would infringe (that's what a "sub-set" is). In reality, however, what Google holds is a NARROWER SET OF CLAIMS. Whether the resulting Google VR will infringe on ONEV's patent(s) is not a foregone conclusion, and time will tell. If Google's claims simple WERE a "sub-set" of ONEV's claims, then the patent application would have been rejected. The patent office, however, determined that Google had INVENTED something DIFFERENT from the claims contained in ONEV's patent(s). Whether Google will be able to develop a product that implements the Google patent claims without infringing on ONEV's broader claims will be an interesting bit of intellectual property analysis.