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 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 and large companies alike to become members. Smaller members act as