1C's stance on head-tracking devices for BoB?

[Wolf_Rider]

Originally Posted by AndyJWest

They have since tried to claim that they 'invented' the interface for 6DOF, rather than implementing (badly) a particular instance of such an interface. They are probably entitled to stop other hardware manufactures from using their interface, IF they accept that it isn't original, protected by any particular copyright etc beyond being an instance of an implementation of a particular solution to a generic problem.

NP developed an interface for their hardware...do you have something which can prove NP only implemented (badly) a particular instance of such an interface?