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| Keywords: Sampson Mordan 1822 pencil-holders patent.png en Detail of the specification of the patent granted in december 1822 to Sampson Mordan and John Hawkins for improvements on pencil-holders The Repertory of patent inventions and other discoveries and improvements in arts manufactures and agriculture; being a continuation on an enlarged plan of the Repertory of arts manufactures a work originally undertaken in the year 1794 and still carried on with a view to collect record and bring into public notice the useful inventions of all nations Volume II Published for the proprietors by T and G Underwood 1826-04 PD-old Mechanical pencils 1822 in England British patent drawings Manufacture of pencils | ||||
