ALEXANDRIA, Va., July 23 -- United States Patent no. 12,365,197, issued on July 22, was assigned to C. JOSEF LAMY GMBH (Heidelberg, Germany).
"Writing instrument" was invented by Wilhelm Berberich (Krautheim, Germany) and Andre Hertwig (Erlbach, Germany).
According to the abstract* released by the U.S. Patent & Trademark Office: "A writing instrument with an operating side, with a writing side with a nib, with a tank which can be filled with liquid writing medium, with a piston, which is movable within the tank, and with an operating element arranged on the operating side for axial adjustment of the piston within the tank. The writing instrument is characterized in that the operating element can be brought by a user from a first axial pos...