In 1928 the company was partially nationalized and renamed to Państwowe Zakłady Inżynieryjne (State Engineering Works, PZInż), but it continued to use the old name of CWS as the brand name for the motorcycles until the outbreak of the Invasion of Poland.
It was created by the Polish minister of industry Eugeniusz Kwiatkowski on March 19, 1928, out of several previously existing state-owned factories and scientific institutes, among them the Centralne Warsztaty Samochodowe and the Ursus factory.
In Poland the state-owned Państwowe Zakłady Inżynieryjne produced license-built Saurer engines (powering, among others, the 7TP and 9TP tanks) and coach chassis used in the Zawrat bus.
License-built in Poland by the state-owned Państwowe Zakłady Inżynieryjne (as the PZInż. Major 4), the engine was used in, among others, Zlin Z-XIII, RWD-11 and one of the PWS-35 Ogar prototypes.