ALEXANDRIA, Va., March 17 -- United States Patent no. 12,576,308, issued on March 17, was assigned to Tonal Systems Inc. (San Francisco).

"Form feedback" was invented by Brandt Belson (San Francisco), Jeff Bendel (Walnut Creek, Calif.) and Kelly Savage (Los Angeles).

According to the abstract* released by the U.S. Patent & Trademark Office: "Detecting quality of use of an exercise machine includes detecting a path of an actuator over time during use of the exercise machine. It further includes characterize the path including generating at least one parameter associated with the path. It further includes comparing the at least one parameter associated with the detected path to a canonical parameter.Providing feedback on quality of use of a...