ALEXANDRIA, Va., March 3 -- United States Patent no. 12,568,131, issued on March 3, was assigned to Salesforce Inc. (San Francisco).

"Ambient, ad hoc, multimedia collaboration in a group-based communication system" was invented by Daniel Stewart Butterfield (San Francisco), Tamar Yehoshua (San Francisco), Noah Weiss (San Francisco), Johnny Rodgers (Vancouver, Canada), Kevin Marshall (Mill Valley, Calif.), Anna Niess (Hastings-on-Hudson, N.Y.), Pedro Carmo (Brooklyn, N.Y.), Ethan Eismann (Orinda, Calif.), Chris Willmore (Alameda, Calif.) and David Ly-Gagnon (San Francisco).

According to the abstract* released by the U.S. Patent & Trademark Office: "Medium, method and system for ad hoc, ambient, synchronous multimedia collaboration in a gro...