ALEXANDRIA, Va., April 21 -- United States Patent no. 12,607,005, issued on April 21, was assigned to ICITI GmbH (Leipzig, Germany).

"Hydraulic mechanism and method for lifting and lowering floor slabs" was invented by Truong The Vu (Paralimni, Cyprus), Ky Xuan Nguyen (Da Nang, Viet Nam) and Hoang Nguyen Pham (Hanoi, Viet Nam).

According to the abstract* released by the U.S. Patent & Trademark Office: "The provided is a hydraulic mechanism for lifting and lowering floor slabs that operates by assembling (combining) the upper stories at a low elevation (above ground floor slab level), then lifting them to the designed elevation by means of specialized lifting devices. The provided includes a combination of features, including: building col...