ALEXANDRIA, Va., Nov. 18 -- United States Patent no. 12,472,657, issued on Nov. 18.
"Table saw guard" was invented by Chin-Chin Chang (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A table saw guard has a riving knife, a mounting frame, a blade guard, and a switch. The riving knife has a first positioning slot and a second positioning slot. The mounting frame has a first positioning pin to enter or withdraw from the first positioning slot. The blade guard and the switch are pivotally connected to the mounting frame, and the switch has a second positioning pin. When the switch pivots toward a locking position, the second positioning pin is located in the second positioning slot to position t...