First patent for inner skirt

By Jean-Pierre Volatron; posted April 19, 2006

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About the question What was the first insulator with an inner skirt, I have found a patent deposited in London on 1848, september 4 by Esquire John Lewis Ricardo, of Lowndes Square, County of Middlesex, G.B. It looks to me it could be the very first insulator with an inner skirt.

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