| # | Country | Total Patents | |
|---|---|---|---|
| #1 | South Africa | 7 | |
| #2 | United States | 3 | |
| #3 | Yugoslavia (Serbia and Montenegro) | 3 | |
| #4 | Israel | 2 | |
| #5 | Brazil | 1 | |
| #6 | Canada | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Ireland | 1 | |
| #9 | India | 1 | |
| #10 | Norway | 1 | |
| #11 | Zambia | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Thermal processes | |
| #3 | Chemical engineering | |
| #4 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Building materials | |
| #2 | Rare-earth metal compounds | |
| #3 | Inorganic compounds | |
| #4 | Furnaces | |
| #5 | Details of furnaces | |
| #6 | Separation | |
| #7 | Pig-iron processing | |
| #8 | Presses |
| # | Name | Total Patents |
|---|---|---|
| #1 | Williamson J | 7 |
| #2 | Heasman N | 5 |
| #3 | Gilpin W | 5 |
| #4 | Lythe T | 4 |
| #5 | Gilpin W C | 3 |
| #6 | Brereton R | 3 |
| #7 | Bown B | 2 |
| #8 | Randle R | 2 |
| #9 | Hedley C | 2 |
| #10 | Clifford Briggs Charles | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4033778A | Process for making magnesia | |
| GB1483051A | Filtration apparatus | |
| ZA7401789B | Filtration apparatus | |
| ZA7208217B | Process for making magnesia |