R2 Solutions LLC, a subsidiary of publicly traded Acacia Research Corporation, continues to hit companies with patents from the large former Yahoo portfolio that Acacia acquired in 2020 through Excalibur IP, LLC. The latest defendants are American Airlines (4:22-cv-00353), Citigroup (4:22-cv-00357), CVS (4:22-cv-00354), and Hilton (4:22-cv-00356), each sued in Eastern District of Texas complaints that have been assigned to District Judge Amos L. Mazzant, who just this past January handed down a claim construction order that resolved multiple disputes over the meaning of terms from the claims of the patents asserted in this latest round of cases.