GreenShift Sues Guardian Energy for Patent Infringement ALPHARETTA, Ga.--(BUSINESS WIRE)--GreenShift Corporation (OTCQB: GERS) today announced that its wholly-owned subsidiary, GS CleanTech Corporation, has filed suit against Guardian Energy, LLC, in the United States District Court for the District of Minnesota for infringement of GreenShift’s patented corn oil extraction processes. GreenShift will continue to defend against all infringement of its ...
June 10, 2013 - Business Wire