United States Patent Office. Revised Classification of Patents: Classification Definitions. Washington, DC: United States Patent Office, 1910.
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used
United States Patent Office. Revised Classification of Patents: Classification Definitions. Washington, DC: United States Patent Office, 1910.
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identifier
2000093532
created
2015-03-31T14:26:25
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title
United States Patent Office. R ...... ed States Patent Office, 1910.
shortTitle
United States Patent Office, Revised Classification (1910)