| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 9 | |
| #2 | United Kingdom | 4 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Machine tools | |
| #3 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Metal tempering | |
| #2 | Rolling metal | |
| #3 | Furnaces | |
| #4 | Burners |
| # | Name | Total Patents |
|---|---|---|
| #1 | Gruenewald Heinrich | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB449485A | Improvements in and relating to annealing pots | |
| GB449332A | An annealing pot for clean annealing band iron, wire, metal sheet, drawn and pressed parts | |
| GB245691A | Improvements in rolling mills | |
| GB250373A | Improvements in and relating to annealing and similar furnaces |