Classical unified field theories a survey of classical relativistic field theories of gravitation that have been motivated by theoretical concerns other than unification, see Classical theories of gravitation. For a survey of current work toward creating a quantum theory of gravitation, see quantum gravity. The early attempts at creating a unified field theory began with the Riemannian geometry of general relativity, and attempted to incorporate electromagnetic fields into a more general geometry, since ordinary Riemannian geometry seemed incapable of expressing the properties of the electromagnetic field. Einstein was not alone in his attempts to unify electromagnetism and gravity; a large number of mathematicians and
Unified Patents pay for purchasing or licensing patents from patent trolls or NPEs. Unified Patents Unified Patents is a member-based organization whose goal is reducing the number of non-practicing entity (NPE) assertions in specific technology areas. Instances of NPE patent litigation have grown recently: NPEs (commonly referred to as patent trolls) accounted for the majority of patent infringement litigation in the U.S. in 2012, compared to less than a quarter in 2007. This is because NPEs can achieve a quick return on investment since most companies settle rather than fight, even if they believe the assertion to be invalid. Unified permits small