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Patent for earplugs, joined by wire to soften "continuous sound [which] may be unpleasant or distressing to individuals" such as that of the railway.
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Specification of Francis Fearon: softening or deadening sound
1864, Great Seal Patent Office
in English
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Book Details
Edition Notes
Cover title.
At head of title: A.D. 1864, 11th November. No. 2809.
"Francis Fearon, of Great George Street, Westminster, in the county of Middlesex, gentleman".
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