| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 4 | |
| #2 | United Kingdom | 3 | |
| #3 | Germany | 2 | |
| #4 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Machine tools | |
| #3 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Metal tempering | |
| #2 | Fluid fuel combustion | |
| #3 | Punching metal |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dahl Franz | 11 |
| Publication | Filing date | Title |
|---|---|---|
| US931916A | Hearth-furnace. | |
| GB190804251A | Improvements in or relating to Railway Chairs. | |
| GB190721103A | Improvements in Furnaces. | |
| GB190619542A | Apparatus for Automatically Removing the Rolling Scale from Slabs, Blooms, and other Rolled Goods by Means of Water. | |
| US696010A | Hydraulic press. |