(October 26, 2015, 1:39 PM EDT) -- BOSTON — An expert may testify on his reasonable royalty rate calculation in a patent infringement lawsuit, a Massachusetts federal judge ruled Oct. 23; however, the judge barred the expert from testifying that a nonexclusive hypothetical license would command a higher royalty rate (Trustees of Boston University v. Everlight Electronics Co. Ltd., et al., No. 12-11935, Trustees of Boston University v. Epistar Corp., et al., No. 12-12326, Trustees of Boston University v. Lite-On Inc., et al., No. 12-12330, D. Mass.; 2015 U.S. Dist. LEXIS 144332)....