Proppant Express Investments Prevails in Patent Trial and Appeal Board Ruling Resulting in Invalidation of SandBox Logistics Patent Claims – Yahoo Finance

Proppant Express Investments Prevails in Patent Trial and Appeal Board Ruling Resulting in Invalidation of SandBox Logistics Patent Claims  Yahoo Finance

With this ruling, the PTAB has issued rulings on all the asserted patents currently challenged by PropX through IPR proceedings and, in each case, has …