| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 6 | |
| #2 | United Kingdom | 4 | |
| #3 | Italy | 2 | |
| #4 | Austria | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Environmental technology | |
| #3 | Machine tools | |
| #4 | Thermal processes | |
| #5 | Mechanical elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hollweg Heinrich | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1402248A | Tuyere | |
| FR2007533A7 | Oxygen supply head used in steel making | |
| GB1145919A | Improvements in and relating to a closure plate for a hot-blast slide valve |