In In re: Cray, Inc, No. 2017-129, the CAFC issued a writ of mandamus vacating Judge Gilstrap’s decision involving venue under 28 U.S.C. §1400(b) in Raytheon Co. v. Cray Inc., Case No. 15-cv-1554 (E.D. Texas). That earlier decision raised concerns over whether the Supreme Court’s venue holding in TC Heartland LLC v. Kraft Foods Group Brands LLC, 137 S. Ct. 1514 (2017), would be given full effect. Judge Gilstrap had applied a broad 4-factor test for finding whether a defendant such as Cray had a “regular and established place of business” in the Eastern District of Texas under §1400(b). Judge Gilstrap’s test had attracted significant attention, and posited the Eastern District of Texas against most other district courts in applying § 1400(b).