ALEXANDRIA, Va., June 5 -- United States Patent no. 12,274,407, issued on April 15, was assigned to CARL FREUDENBERG KG (Weinheim, Germany).
"Frame system and cleaning device frame" was invented by Carlo Messineo (Milan), Felix Fallenstein (Speyer, Germany), Nikolai Sand (Speyer, Germany), Maik Bieganski (Weinheim, Germany) and Ralf Juergens (Laudenbach, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A frame system for a modular construction of flat mop cleaning device frames including a first carrier plate having a first length in a longitudinal direction and a first width in a transverse direction, and a second carrier plate having a second length in the longitudinal direction different from the fi...