ALEXANDRIA, Va., June 18 -- United States Patent no. 12,325,076, issued on June 10, was assigned to WTO Vermogensverwaltung GmbH (Ohlsbach, Germany).

"Operating key for stationary and driven tool holders" was invented by Matthias Vogt (Oberkirch, Germany) and Karlheinz Jansen (Schutterwald, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "The invention relates to a drive device for clamping and releasing a tool in the tool holding fixture of a tool holder. The drive device according to the invention prevents incorrect operation; said drive device can be operated manually or by a handling robot and can be actively locked to the tool holder."

The patent was filed on May 27, 2020, under Application No. 1...