ALEXANDRIA, Va., Jan. 20 -- United States Patent no. 12,529,192, issued on Jan. 20, was assigned to Plasser & Theurer Export von Bahnbaumaschinen Gesellschaft m.b.H. (Vienna).

"Machine and method with a tamping unit" was invented by Thomas Philipp (Leonding, Austria) and Josef Hofstatter (Puchenau, Austria).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tamping machine has a tamping unit for simultaneously tamping sleepers of a track that are positioned directly behind one another. Tamping unit segments are arranged one behind the other. Each tamping unit segment has a height-adjustable tamping tool carrier on which opposing tamping tools are mounted that are coupled to a vibration drive via squeezing cylin...