ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,408,759, issued on Sept. 9.
"Self-retractable step" was invented by Frederick Reid (Montreal).
According to the abstract* released by the U.S. Patent & Trademark Office: "A self-retractable step for assisting a user in elevating him or herself above a floor, is disclosed. The self-retractable step comprises a self-retractable foot member and a cylindrical assembly coupled with the self-retractable foot member. The foot member is configured to move from one position to another position. The cylindrical assembly comprises a rotary member, one or more spring members and a protuberance member. The rotary member is configured to move the foot member to a predetermined position. Further, ...