ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,483,336, issued on Nov. 25, was assigned to CIENA Corp. (Hanover, Md.).

"Method and system for fine frequency finesse filtering" was invented by Shahab Oveis Gharan (Ottawa) and Kim Byron Roberts (Ottawa).

According to the abstract* released by the U.S. Patent & Trademark Office: "Aspects of the subject disclosure may include, for example, obtaining a signal received at a coherent optical receiver, and equalizing the signal using a filter system, wherein the filter system includes a first filter that provides a first filtering characteristic, a second filter that provides a second filtering characteristic, and a third filter that provides a third filtering characteristic, wherein an ...