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Report of the Commissioner of Patents for the Year 1855/en-ca/report-of-the-commissioner-of-patents-for-the-year-1855/469EF9BC-2C5A-4559-9614-1D4CED161CCC.html469EF9BC-2C5A-4559-9614-1D4CED161CCC
Report of the Commissioner of Patents for the Year 1840; Volume 1840