Frank Whittle invented and built the first Jet Engine.
During the Korean War, the first American made jet engine for the US Air Force was General Electric. Soon after the Pratt and Whitney corporation developed a faster jet engine for the US Air Force.
You're probably thinking of Rolls-Royce--one of the biggest jet engine manufacturers--but the first real jet engine was built by the Heinkel airplane company in 1935.
The first purpose-built jet airliner was the British de Havilland Comet which first flew in 1949 and entered service in 1952
the flight of the first jet airplane was in Germany
jet metel
The Germans invented the first operational jet engine during WW2.
Depends on which model and brand of jet engine you are asking about. There have been many jet engines designed and built by many different companies over the years.
The first jet engine was invented by a English engineer called Sir Frank Whittle
Sir Frank Whittle patented his design in 1930 and built a jet engine which first ran in 1937, Hans von Obain patented his design in 1936 and built and ran one also in 1937, but 5 months after Whittle had built his. Hans von Obain's invention that powered a specially built Heinkel in August 1939. Sir Frank Whittle's similar (and arguably the more successful design) first flew in a Gloster in May 1941. That engine was dubbed the "W1" and the aircraft was a "Pioneer"
Gloucester is where the first jet engine was developed .
Heinkel in Germany built the first flying jet aircraft.