ALEXANDRIA, Va., July 15 -- United States Patent no. D1,131,641, issued on June 23, was assigned to FABER-CASTELL AG (Stein, Germany).

"Writing instrument" was invented by Peter Wilden (Cologne, Germany), Julian Sommer (Malmo, Sweden), Andre Poulheim (Frechen, Germany), Eunsoo Ko (Cologne, Germany) and Stefan Kenta Hohn (Paris).

The patent was filed on Sept. 11, 2024, under Application No. D/962,404.

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