ALEXANDRIA, Va., Feb. 19 -- United States Patent no. 12,227,913, issued on Feb. 18.
"Mobile foundation for tower cranes and fast-erecting cranes" was invented by Thomas Kainzmayer (Pfaffstatten, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "The mobile foundation for tower cranes and fast-erecting cranes comprises at least two floor elements made from metal, which may be releasably connected to one another, in particular screwed to one another, wherein the floor elements have anchoring devices for a crane tower. Transportable, reusable ballast weights may be supported on at least one support surface of the foundation. There is provided a passage element having uprights and/or side walls, wherein the ...