| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 43 | |
| #2 | United Kingdom | 5 | |
| #3 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Electrical machinery and energy | |
| #3 | Transport | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Shafts | |
| #2 | Vehicle wheels | |
| #3 | Electric switches | |
| #4 | Unspecified technologies | |
| #5 | Safety devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Vanwersch Aloys | 43 |
| #2 | Aloys Vanwersch | 3 |
| #3 | Ludwig Vanwersch | 2 |
| #4 | Peter Vanwersch | 2 |
| Publication | Filing date | Title |
|---|---|---|
| GB1083217A | A support for an underground roof | |
| GB848534A | Mine roof bars | |
| US3043108A | Mine roof bar arrangement | |
| GB819699A | Mine roof support bar | |
| US2991097A | Connecting structure for beams of a roof support or the like |