Bristol Aero-Engines
formerly the Engine division of the Bristol Aeroplane Co.
1953 Robin Ralph Jamison and Frank Dryburgh Henderson, Bristol, England, patented in USA "Fuel supply systems for ram jet engines", assigned to Bristol Aero-Engines Limited, which seems to have been the first of many patents for this company (but query whether the company name was altered before final acceptance of the patent as the British patent was assigned to Bristol Aeroplane Co).
1954 "Bristol Aero Engines Ltd’s new plant into operation."[1]
1956 The aero-engine division of the Bristol Aeroplane Co had been renamed Bristol Aero-Engines Ltd[2]
1958 Started work developing the Pegasus engine for the P.1127 vertical take-off aircraft
1958 Merged with Armstrong Siddeley Motors to form Bristol Siddeley Engines [3]