Example image of eyePlorer eyePlorer map for 'John Walker (inventor)': 1781 1826 1859 England Match May 1 May 29 Pharmacist Stibnite Stockton-on-Tees 1827 April 7 September 7 1828 Patent Botany Mineralogy Norton, County Durham John Walker 1827 in the United Kingdom Radio Tees 1859 in the United Kingdom 1781 in Great Britain List of Chinese inventions
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