| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 5 | |
| #2 | United Kingdom | 3 | |
| #3 | Spain | 2 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Mining |
| # | Name | Total Patents |
|---|---|---|
| #1 | Neukirch Hubert Valentin | 9 |
| #2 | Freytag Ernst Emil | 4 |
| Publication | Filing date | Title |
|---|---|---|
| GB190810946A | Improvements in or relating to Machinery for Cutting Coal | |
| GB190627187A | Acetylene Lamp | |
| GB190322957A | Improvements relating to Machines for Cutting or Mining Coal and other Minerals. | |
| US733073A | Means for cutting coal, &c. |