Group by: Item Type | No Grouping Jump to: Patent Number of items: 3. PatentCouncil of Scientific and Industrial Research (1975) Improvements in or relating to decorative finish on copper and its alloys. 137870. Council of Scientific and Industrial Research (1974) Improvements in or relating to electropolishing of mild steel. 135147. Council of Scientific and Industrial Research (1974) Improvements in or relating to electrolytic bath composition for integral colour anodising of aluminium and its alloys. 132423. |