ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,555, issued on Sept. 16, was assigned to ALFRED KARCHER SE & Co. KG (Winnenden, Germany).
"Cleaning cart" was invented by Patrick Armbruster (Winnenden, Germany), Jochen Burchard (Winnenden, Germany), Denis Dammkohler (Winnenden, Germany), Kamila Dobler (Winnenden, Germany), Beyza Guegercin (Winnenden, Germany), Marten Jahn (Winnenden, Germany), Jens Kuhn (Winnenden, Germany) and Calogero Maniscalco (Winnenden, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to cleaning cart, comprising a frame having a frame lower part, a frame upper part and support parts which connect the frame lower part to the frame upper part and ...