ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,239, issued on Jan. 13, was assigned to EBM-PAPST MULFINGEN GMBH & Co. KG (Mulfingen, Germany).
"Fan" was invented by Niels Blaha (Bad Mergentheim, Germany) and Daniel Gebert (Oehringen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A fan with a housing which defines an axial flow channel having a cross-section, wherein the flow channel has a first axial portion on the suction side and a second axial portion adjoining in the flow direction. The flow channel has a first cross-section in the first axial portion a transitioning cross-section through the second axial portion. The cross-section is arranged concentrically in an imaginary rectangu...