ALEXANDRIA, Va., March 5 -- United States Patent no. 12,244,481, issued on March 4, was assigned to OPEN TEXT Corp. (Waterloo, Canada).

"Activity stream based collaboration" was invented by Jeroen Mattijs van Rotterdam (Fort Lauderdale, Fla.) and Gary Frankel (Nevada City, Fla.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An activity stream based interaction model is disclosed. To cause a desired application level action to be performed at a remote system, such as automatically retrieving and displaying a document in a viewer or other portion of a user interface at the remote system, a text-based tag, such as a hash tag, is inserted into an activity stream. The activity stream is sent to the remote system,...