On this day in 1943 Henry Peterson was granted the patent for Mouse Trap. U.S. Patent No. 2,321,617.
The object of this invention is to provide a mouse trap made of metal, for sanitary reasons, and in which while setting the trap the bait holding trigger and the trigger latch are held in positions for automatic latching when the jaw is depressed, without the necessity of being guided or touched by the operator’s fingers, thereby avoiding danger of accident.