Subject-matter Index of Patents for Inventions: issued by the United States Patent office from 1790 to 1873, inclusive - Vol. 1 - Couverture souple

Leggett, Mortimer Dormer; Patent Office, United States

 
9783337703738: Subject-matter Index of Patents for Inventions: issued by the United States Patent office from 1790 to 1873, inclusive - Vol. 1

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