| # | Country | Total Patents | |
|---|---|---|---|
| #1 | New Zealand | 3 | |
| #2 | South Africa | 3 | |
| #3 | Canada | 2 | |
| #4 | Norway | 2 | |
| #5 | United States | 2 | |
| #6 | WIPO (World Intellectual Property Organization) | 2 | |
| #7 | Brazil | 1 | |
| #8 | Egypt | 1 | |
| #9 | EPO (European Patent Office) | 1 | |
| #10 | Finland | 1 | |
| #11 | India | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Surface technology and coating | |
| #3 | Environmental technology | |
| #4 | Machines | |
| #5 | Chemical engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Walpole Ernest Alan | 14 |
| #2 | Walpole Ernest Allan | 3 |
| #3 | Walpole Ernest A | 2 |
| #4 | Ernest Allan Walpole | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ZA9404548B | Primary beneficiation of ilmenite | |
| EG20384A | Process for separating ilmenite | |
| ZA9300942B | Acid regeneration. | |
| BR9106829A | Process to separate ilmenite | |
| NZ239532A | Separation of ilmenite from raw sand or mineral concentrates including separation by density, magnetic separation and a fluidised bed roast |