At issue in this suit was a claim of patent infringement by ArcelorMittal France and ArcelorMittal Atlantique et Lorraine (collectively "ArcelorMittal") against AK Steel et al. of Patent No. 6,296,805, entitled "Coated hot- and cold-rolled steel sheet comprising a very high resistance after thermal treatment," ("the '805 patent") which has been issued by the U.S. [read post]