ALEXANDRIA, Va., March 17 -- United States Patent no. 12,579,121, issued on March 17, was assigned to GraphSQL Inc. (Redwood City, Calif.).

"Management of a secondary vertex index for a graph" was invented by Songting Chen (Portola Valley, Calif.), Yu Xu (Millbrae, Calif.), Dan Hu (Sunnyvale, Calif.) and Zixuan Zhuang (San Jose, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Systems, methods, and software described herein manage and use a secondary index associated with graph vertices. In one example, a graph management system may generate an index for vertices in a graph associated with an attribute type, wherein each of the vertices include a unique identifier and one or more attributes, and wherein...