ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,156, issued on June 24, was assigned to Novo Nordisk A/S (Bagsvaerd, Denmark).
"Piston rod drive mechanism" was invented by Nikolaj Eusebius Jakobsen (Soeborg, Denmark).
According to the abstract* released by the U.S. Patent & Trademark Office: "The present invention provides a piston rod displacement mechanism for a pen injection device, comprising: a tubular housing (2) extending along a reference axis and comprising an interior housing surface (3) with a first engagement structure (4), a nut member (5) fixed within the tubular housing (2), a piston rod (15) comprising a first non-self-locking thread (18) having a first thread direction and a first thread pitch and being engage...