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Index of all patents granted in England from January 1846 to December 1850 inclusive with alphabetical arrangement of all the inventions within the above period; and references, showing the specifications published in the repertory of arts etc
Index of all patents granted in England from January 1846 to December 1850 inclusive with alphabetical arrangement of all the inventions within the above period; and references, showing the specifications published in the repertory of arts etc
Patent Office1851
Articles
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