Teasdale Brothers of Thomas Street, Bank Top; Warehouse, Feethams, Darlington and Bridge Road, Stockton.
1904 Woolf-type compound beam engine at Darlington Waterworks. Photographed by George Watkins in 1952
1906 Started in the i/c engine market
1910 The i/c engines ranged from 3 to 40 hp. Later increased to 50 hp.
1914 Directory: Listed as Iron Founders. 
1915 Introduced the New Improved Teasdale Oil Engine in sizes 3 to 35 hp
Maker of stationary engines. 
Sources of Information
- ‘Stationary Steam Engines of Great Britain: Volume 2: Scotland, Cumberland, Co Durham & Northumberland: Landmark Publishing Ltd, 2001
- Kelly's Directory of Durham, 1914 p713
- Stationary Steam Engines of Great Britain by George Watkins. Vol 10
- A-Z of British Stationary Engines by Patrick Knight. Published 1999. ISBN 1 873098 50 2