ALEXANDRIA, Va., Dec. 9 -- United States Patent no. 12,491,409, issued on Dec. 9.
"Safety anchor" was invented by Karl Guthrie (Austin, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "A safety anchor for installing in a hole drilled into a structure, the anchor having a hanger member, a threaded member, and a hollow sleeve member, the sleeve member having a lip portion adapted to stand outside the drilled hole to facilitate grasping the sleeve portion and removing it from the hole after the anchor has been installed in the drilled hole, and the hanger member having a recess adapted to provide a volume of relief above the surface of the structure for receiving the lip member."
The patent was filed on Se...