| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 18 | |
| #2 | Canada | 1 | |
| #3 | Spain | 1 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Electrical machinery and energy | |
| #3 | Packaging and shipping | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Shafts | |
| #2 | Safety devices | |
| #3 | Electric switches | |
| #4 | Vehicle wheels | |
| #5 | Transport or storage devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Vanwersch Aloys | 19 |
| #2 | Vanwersch Ludwig | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ES254678A1 | Improvements in the construction of irons, supports or covering beams to enzy the land in the mining exploitation (Machine-translation by Google Translate, not legally binding) | |
| GB762667A | A wedge for use in connections for girders for supporting mine roofs | |
| CA617921A | Roof bar arrangements, especially for mines |