ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,448,842, issued on Oct. 21, was assigned to JIANGSU ZHOU JIJIE INTELLIGENT TECHNOLOGY Co. LTD (Suqian, China).
"Two-step step stool" was invented by Xuelin Zhu (Suqian, China), Baisong Yao (Suqian, China) and Weiqiang Liu (Suqian, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "A two-step step stool includes a primary stool and a secondary stool. The primary stool includes a primary supporting plate and a primary pedal hinged with a top of the primary supporting plate. The secondary stool includes a secondary supporting plate and a secondary pedal hinged with a top of the secondary supporting plate. The secondary pedal is higher than the primary pe...