ALEXANDRIA, Va., June 25 -- United States Patent no. 12,338,849, issued on June 24, was assigned to AVVIO GMBH & CO KG (Graz, Austria).
"Screw drive" was invented by Gerhard Hubmann (Graz, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "A screw head bush for a screw, wherein the screw head bush has an external portion and an internal portion following the external portion, wherein the external portion has a larger diameter than the internal portion and the external portion is configured essentially as a truncated cone tapering towards the internal portion and the internal portion is configured as engagement geometry for the rotationally fixed accommodation of a screw head drive."
The patent was filed...