ALEXANDRIA, Va., March 31 -- United States Patent no. 12,588,607, issued on March 31, was assigned to Andreas Stihl AG & Co. KG (Waiblingen, Germany).
"Electric blower apparatus with battery pack" was invented by Roland Mandel (Stuttgart, Germany), Sebastian Piekarek (Stuttgart, Germany), Markus Koenig (Leinfelden-Echterdingen, Germany) and Andrea Hein (Ehningen, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "The disclosure relates to an electric blower apparatus having a back plate, for carrying on the back of a user. The back plate has a plate axis, oriented in the vertical direction, an upper plate section and a lower plate section. The blower spiral of the blower apparatus comprises an axial end ...