One three days ago we reported that CopyTele's lawsuit against E Ink was dismissed (although they do have to participate in the CopyTele vs AUO arbitration meetings) - and today a new lawsuit was charged against E Ink, Amazon, B&N and Sony, this time by Research Frontiers.
Research Frontiers developed a technology called SPD, a smart light-control technology. They say that E Ink and the other companies infringed upon two of their patents. Research Frontiers say they have invested about $90 million dollar in decades of research to develop the SPD technology. Over 40 companies around the world entered into a license agreement with them.
Those patents are US#6,606,185 ("SPD Films and Light Valves Comprising Liquid Suspensions of Heat-Reflective Particles of Mixed Metal Oxides and Methods of Making Such Particles") and US#5,463,491 ("Light Valve Employing a Film Comprising an Encapsulated Liquid Suspension, and Method of Making Such Film").