Quarterhill Inc. acquired over 1,000 US assets from two major semiconductor foundries in late 2018/early 2019, according to USPTO records released this month. The transacted portfolios include patents originating with Advanced Micro Devices (AMD), DB HiTek, GlobalFoundries, IBM, Renesas, and STMicro. While the assignments were executed in November 2018/January 2019, they were only recently recorded with the USPTO—possibly in preparation for litigation by Quarterhill.