The Townend Ring Boulton & Paul, Limited, announce that they are the holders of all the Foreign and Dominion patents covering the device known as the Townend King, and that in addition to the original patents they have applications pending both in this country and abroad for certain important improvements on the original device.
(1930), "Recent Technical Developments: Manufacturing the Townend Ring—Two Hundred Years of Weighing and Testing Machine Manufacture—German Aviation Subsidies—Bristol Engine Works", Aircraft Engineering and Aerospace Technology, Vol. 2 No. 6, pp. 155-155. https://doi.org/10.1108/eb029280
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