ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,385,717, issued on Aug. 12.
"Twist-action pen gun" was invented by Christoph Kowar (Vienna).
According to the abstract* released by the U.S. Patent & Trademark Office: "A complete concealed, handheld, single shot pen gun having the full appearance of a well-designed twist action pen equipped with full writing function is presented. The invention provides seamless design without surface interruptions. A drop safety function locks the firing pin in a safe position. The drop safety cannot be deactivated by accident. After activation of the drop safety, the loaded pen gun is suitable for daily use as a regular twist action pen. The exchangeable pen refill can be extended and retracted; a...