ALEXANDRIA, Va., June 9 -- United States Patent no. 12,289,267, issued on April 29, was assigned to Apple Inc. (Cupertino, Calif.).

"Periodic reference signal activation and deactivation" was invented by Yushu Zhang (Beijing), Qiming Li (Beijing), Haitong Sun (Cupertino, Calif.), Jie Cui (San Jose, Calif.), Huaning Niu (San Jose, Calif.), Chunxuan Ye (San Diego), Wei Zeng (Saratoga, Calif.) and Dawei Zhang (Saratoga, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "This disclosure relates to techniques for periodic reference signal activation and deactivation in a wireless communication system. Information configuring periodic reference signals may be received by a wireless device. Information deactivat...