ALEXANDRIA, Va., Oct. 21 -- United States Patent no. 12,440,720, issued on Oct. 14.

"Exercise device" was invented by Willem Johannes van Straaten (Johannesburg).

According to the abstract* released by the U.S. Patent & Trademark Office: "An exercise device having a unique asymmetrical shape with rounded ends of differing radii to provide stability and added resistance is described in this application. The exercise device allows a user to position themselves more comfortably and safer than existing exercise devices. The unique asymmetrical shape enhances results by improving safety. The shape provides a more stable structure that inhibits or eliminates tipping past a point in which a user is in control of the device position. The asymmetr...