of Terminal House, London SW1
1900 On 16th November Parkinson and W. and B. Cowan was incorporated as a public company, manufacturers of gas meters and other gas apparatus, being the amalgamation of 2 of the oldest firms in this business: W. and B. Cowan Ltd of London, Manchester, Edinburgh and New South Wales, and W. Parkinson Ltd of London and Birmingham.
1925 Offer of shares to the public.
1928 The company was renamed Parkinson and Cowan - new shares quoted.
1937 Parkinson and Cowan (Gas Meters) Ltd - Listed Exhibitor - British Industries Fair. Gas Apparatus for Measuring and Recording, including Tin and Iron Meters, Optional Coin Meters, Rotary Meters, Station and Retort House Governors, Test Meters, Gauges, Meter Parts and Accessories. (Stand Nos. Ca.703 and Ca.602)
1939 See Aircraft Industry Suppliers
1958 Parkinson Cowan had 3 divisions:
Name changed to Parkinson Cowan.
1960 Measurement Ltd of Oldham was part of Parkinson Cowan
The name Parkinson Cowan still exists in the UK as a manufacturer of gas stoves, one of the company's early products.