| 1908 | Electro-pneumatic brakes for subways pioneered by WABCO. |
| 1914 | Prolific inventor George Westinghouse dies at the age of 68. It is estimated that he has been awarded a new patent every six weeks for 48 years of his life. |
| 1917 | Union Switch & Signal Company acquired, which develops systems for signalling trains and coordinating train routes. By the 1940s, the first advanced systems are developed, including automatic block signalling, which ensures safe distances between trains on the same track, and centralized traffic control systems. |
| 1921 | Pneumatic brakes developed for the small but rapidly expanding US automotive industry. Air brake components adapted for commercial vehicles, as roads increasingly compete with rail as a mover of people and goods. |
| 1922 | Production facility established in Gronau, Germany |
| 1924 | Due to US antitrust laws, WABCO compelled to form joint venture with Bendix in the US (Bendix-Westinghouse), rather than launch its own line of braking components. In Europe, the WABCO companies are allowed to develop independently. |
| 1939-45 | Pneumatic control developed to reverse a ship’s direction in seconds, giving the vessel the ability to escape torpedoes, mines and bombs during World War II. |
