International patent classification . Volume 1 , Sections A and B
Contents: Volume 1. Section A, human necessitites. Section B, performing operations, transporting -- Volume 2. Section C, chemistry, metallurgy. Section D, textiles, paper -- Volume 3. Section E, fixed constructions. Section F, mechanical engineering, lighting, heating, weapons, blasting -- Volume 4. Section G, physics. Section H, electricity -- Volume 5. Guide.
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Patents--Classification
Physics--Patents
Electricity--Patents
T 255 .F4 / I573 2006