ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,409,535, issued on Sept. 9.
"Pneumatic hammer" was invented by Jian-Shiou Liaw (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pneumatic hammer is provided, including: a handle assembly including a main body and a grip portion, the grip portion being connected to the main body and configured to be connected to a gas source, the main body including an interior space; a hammer assembly connected to and in communication with the grip portion, and including a hammer body and a shaft, the hammer body being movably connected to the shaft, and the hammer body being movably disposed in the interior space to hammer the shaft; and a working as...