| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 8 | |
| #2 | United Kingdom | 4 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Shafts | |
| #2 | Shaping clay |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schaefer Hanns | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB280702A | Improvements in or relating to linings for mines, galleries, tunnels and the like | |
| GB268587A | Improvements in the production of artificial stone blocks | |
| GB262189A | Improvements in or relating to linings for mine and quarry shafts, tunnels and the like made of bricks, moulded plates or the like | |
| GB244510A | Improvements in or relating to linings for mine and quarry shafts, tunnels and the like made of bricks, moulded plates or the like |