(February 25, 2016, 1:58 PM EST) -- SAN FRANCISCO — A judge improperly applied case law from a products liability case in a premises liability case and then compounded the error by denying a motion to amend the complaint, plaintiffs told the Ninth Circuit U.S. Court of Appeals Feb. 18 (Titus May, etc., et al. v. Northrop Grumman Systems Corp., etc., et al., No. 15-56219, 9th Cir.)....