ALEXANDRIA, Va., April 7 -- United States Patent no. 12,594,656, issued on April 7, was assigned to Heller Tools GmbH (Dinklage, Germany).

"Drill bit for percussion drilling or impact drilling use for cutting reinforcing steel in concrete" was invented by Rainer Lampe (Dinklage, Germany), Torsten Thiel (Quakenbrueck, Germany) and Guido Hoff (Wetschen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A drill bit for percussion drilling or impact drilling use for cutting reinforcing steel in concrete, wherein the drill bit has a substantially hollow-cylindrical carrier body extending along a geometric drill bit axis, wherein the carrier body has at least one chisel tooth with a substantially radially ext...