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1. Users' guides to the international patent classification

by -- United Nations Industrial Development Organization

Type: book Book; Format: print ; Literary form: not fiction Publisher: Vienna: UNIDO, 1981Availability: Copies available for loan: CSIR-HQRS [347.771 M1] (2).

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2. International patent classification 1979

by -- World Intellectual Property Organization

Edition: 3rd ed. Type: book Book; Format: print ; Literary form: not fiction Publisher: Munchen: Carl Heymanns Verlag, 1980Availability: Copies available for loan: CSIR-HQRS [347.771:025.4 ] (5).

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3. International Patent Classification 1989

by -- World Intellectual Property Organization

Type: book Book; Format: print ; Literary form: not fiction Publisher: Munchen: Carl Heymanns Verlag Availability: Copies available for loan: CSIR-HQRS [347.771:025.4 M9] (9).

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4. Manual of classification

by -- U.S. Department of Commerce

Type: book Book; Format: print ; Literary form: not fiction Publisher: Washington: US Government Printing Office, 1967Availability: Copies available for loan: CSIR-HQRS [347.771:025.4 J7] (1).

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