WASHINGTON, D.C. - A California federal judge erroneously granted a preliminary injunction in a patent infringement dispute, a divided Federal Circuit U.S. Court of Appeals panel held in a Nov. 4 ruling, saying that the defendant has established entitlement to a patent exhaustion defense (LifeScan Scotland Ltd. et al. v. Shasta Technologies LLC et al., No. 13-1271, Fed. Cir.).