| Title Specifications for registration of patent by William Blanch Brain and Arthur James Arnot titled - Improvements in electrical rock drills coal diggers and earth cutters | ||
| Barcode 9047342 | Series number A13150 | Series accession number 2006/00176198 |
| Control symbol 7016 | ||
| Contents date range 1889 - 1889 | Extent 0.1 | Location Canberra |
| Access status Open | Reason for restriction | Date of decision 31 Jul 2009 |