The "no-nausea" bit is more likely a combination of factors: low-latency, head tracking with thus-and-such a precision, field-of-view tweaks, etc.

It'd be like patenting the ideal air-to-gasoline burning ratio: it's just a fact of life.

Short flashy exposures of the display is pretty much standard in gaming monitors and everyone knows it is _the_ thing to do to minimize motion blur (LightBoost).

Using camera to extract absolute position instead of drifty relative mems trackers is also no brainer. This is what N originally did with Wii remote. N also got sued at least four times over this exact technology.