International patent classification.

U.S. patent classification.

Classification of Patents : hearings before the United States House Committee on Patents, Subcommittee on Classification of Patents, Seventy-Sixth Congress, first session, on May 23, 1939.
Published: (1939)

A history of patent classification in the United States Patent and Trademark Office /
by: Rotkin, Irving J.
Published: (1999)

Welding patent classification in the A. F. Davis Welding Library.
by: Green, Robert Smith, 1914-
Published: (1950)

Manual of U.S. patent classification.

Plan of classification of patented inventions.
Published: (1900)

Examiner handbook to the U.S. patent classification system.
Published: (1997)

Classifications under reclass.

Concordance : United States patent classification to international patent classification /

Classification of subjects of invention of U.S. Patent Office arranged by divisions with classes and subclasses in each; revised to July 1, 1908.
Published: (1908)

Classification order.

Classification of patents.
Published: (1917)

Classification orders index.

Classification orders index, 1947-1976 : classification orders no. 1 to no. 500 /
Published: (2002)

Manual of classification of patents.
Published: (1923)

Manual of classification.
Published: (1991)

Classification main menu.
Published: (1997)

Classified index of subjects of invention adopted in U.S. Patent Office.
Published: (1872)

Index to classification of patents, to accompany Manual of classification of patents; revised to Jan. 1, 1924.
Published: (1924)

Automated Patent System : is it meeting examiners' needs? : a report of the U.S. Patent and Trademark Office.
Published: (1995)

Classification of letters patent, etc.
Published: (1898)

Classification of letters patent, etc.
Published: (1898)

Classification of letters patent, etc.
Published: (1898)

Strasbourg Patent Classification Agreement.
Published: (1973)

Strasbourg Agreement Concerning the International Patent Classification.
Published: (1973)

Classification bulletin of U.S. Patent Office from July 1, 1924 to Dec. 31, 1924, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1924)

Classification bulletin of U.S. Patent Office from July 1, 1920 to Dec. 31, 1920, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1920)

Classification bulletin of U.S. Patent Office from Jan. 1, 1919 to June 30, 1919, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1919)

Classification bulletin of U.S. Patent Office from Jan. 1, 1922 to June 30, 1922, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1922)

Classification bulletin of U.S. Patent Office from Jan. 1, 1914 to June 30, 1914, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1914)

Classification bulletin of U.S. Patent Office from Jan. 1, 1924 to June 30, 1924, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1924)

Classification bulletin of U.S. Patent Office from Jan. 1, 1917 to June 30, 1917, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1917)

Classification bulletin of U.S. Patent Office from July 1, 1916 to Dec. 30, 1916, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1916)

Classification bulletin of U.S. Patent Office from Jan. 1, 1910 to June 30, 1910, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1910)

Classification bulletin of U.S. Patent Office from July 1, 1914 to Dec. 31, 1914, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1914)

Classification bulletin of U.S. Patent Office from Jan. 1, 1921 to June 30, 1921, containing classification of subjects of invention revised by Classification Division of U.S. Patent Office.
Published: (1921)