ALEXANDRIA, Va., March 19 -- United States Patent no. 12,254,446, issued on March 18, was assigned to BLUESCAPE BUYER LLC (Chicago).

"Collaboration system including a spatial event map" was invented by David M. Foley (Seattle), Adam Pearson (Seattle) and Demian Entrekin (Oakland, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A spatial event map system including server-side data processor that maintains a spatial event map which locates events in a workspace. The spatial event map includes a log of events, entries in the log having a location of an object of the event in the workspace and a time. The system includes logic to send messages including a location of an object of the event in the workspace...