Promptu Systems Corporation v. Comcast Corporation, et al.

IN THE UNITED STATES DISTRICT COURT FOR THE EASTERN DISTRICT OF PENNSYLVANIA PROMPTU SYSTEMS CORPORATION : CIVIL ACTION : v. : No. 16-6516 : COMCAST CORPORATION, et al. : MEMORANDUM Judge Juan R. Sánchez September 14, 2026 In its “bench brief,” provided to the Court at the August 4, 2026 pretrial conference, Promptu seeks a ruling, in advance of the inequitable conduct bench trial, that issue preclusion principles prevent Comcast from making any argument that

U.S. Patent No. 6,513,063

(“Julia”) is but-for material to the ʼ538 patent at issue in this case. Specifically, Promptu argues Comcast…