The Classification of Patents
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Official Gazette of the United States Patent Office (Classic Reprint): Supplement, Containing the Revised Classification of Subjects of Invention, Alphabetically Arranged; January 1, 1889
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Corcordance, United States patent classification to international patent classification. 1995 [Leather Bound]
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Classification of United States patents on electrotyping 1934 [Leather Bound]
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Classification Of Subjects Of Invention Of The United States Patent Office, Arranged By Divisions With Classes And Subclasses In Each
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Manual Of Classification Of Subjects Of Invention Of The United States Patent Office: Revised To January 1, 1912 (including Classification Bulletin No. 27)
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Manual of Classification of Subjects of Invention of the United States Patent Office: Revised to January 1, 1920; (Including Classification Bulletin No. 43) (Classic Reprint)
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Manual of Classification of Subjects of Invention of the United States Patent Office: Revised to January 1, 1916 (Including Classification Bulletin No; 35) (Classic Reprint)
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Manual Of Classification Of Subjects Of Invention Of The United States Patent Office
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Official Gazette of the United States Patent Office: Supplement Containing the Revised Classification of Subjects of Invention, Arranged by Divisions, and the Sub-Classes Arranged Alphabetically; Janu
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