ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,728,551, issued on Sept. 8.

"Folding knife with acoustic resonator" was invented by Douglas Scott Stills (Arden, N.C.).

According to the abstract* released by the U.S. Patent & Trademark Office: "An acoustic resonator is cut, formed, or milled into the frame, or attached to the frame, of a folding knife to any dimensional specifications that support vibration at a desired sound effect frequency. The sound effect, sometimes referred to as "shwing", "schwing", "ting" or "ping", is acoustically similar to the sound effect a Samurai makes when pulling his sword from its sheath or when he strikes another sword."

The patent was filed on Sept. 9, 2024, under Application No. 18/828,040.

*F...