International patent classification / World Intellectual Property Organization
Medverkande: World Intellectual Property Organization [oth].
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Innehåll:
Andra utgåvor:
Vol. 1. Section A, human necessities -- Vol. 2. Section B, performing operations, transporting -- Vol. 3. Section C, chemistry, metallurgy -- Vol. 4. Section D, textiles, paper -- Vol. 5. Section E, fixed constructions -- Vol. 6. Section F, mechanical engineering, lighting, heating, weapons, blasting -- Vol. 7. Section G, physics -- Vol. 8. Section H, electricity -- Vol. 9. Guide, survey of classes, and summary of main groups -- Vol. 10. Guide