sentences:  After his death in 1884 in Fürstenwalde, his sons Richard, Oskar, Julius Karl, and Albert inherited the business and became successful in the manufacture of compressed Pintsch gas for use in beacons and unmanned lighthouses.The productions also included gas mantle lamps as well as light buoys used in the Kronstadt Bay and the Suez Canal.In 1907, the business was transformed into a public limited company ("AG"); finally broken up in 1967, some branches were later acquired by the Schaltbau GmbH Munich.