Before revision: Hobbs himself had been general manager of the George W. Borg corporation in Chicago from 1930 to 1937, before founding the Springfield company in 1938 and became a director of Stewart-Warner when it bought out his company in 1956.
After revision: Hobbs himself had been general manager of the George W. Borg corporation in Chicago from 1930 to 1937, before founding the Springfield company in 1938 and becoming a director of Stewart-Warner when it bought out his company in 1956.