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Siemens Brothers Dynamo Works Ltd of 14 Bridge Road, Stockton; Lichfield Road, Stafford (from 1903); and Caxton House, Westminster, London, SW.
1906 The electric light, power and traction activity of Siemens Brothers and Co were separated from the rest of the business and transferred to Siemens Brothers Dynamo Works which was incorporated as a limited company.
First British manufacturer of Tantalum filament lamps.
1911 Electrical Exhibition. Electrical synchronising outfit. (Siemens Brothers) 
1914 Dynamo manufacturers. 
1914 Manufacturers of and dealers in electric motors and generators, starters, regulators and controllers for direct and alternating current; switchboards and switchgear of all descriptions; machinery for mines, haulage gear, fans and ventilators, equipment for rolling mills and steel and iron works; electric railways and tramways, electric power transmission, searchlight projectors, lighting and power equipments for ships, machine tools, textile motors and electrical accessories.