| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 20 | |
| #2 | Belgium | 2 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Shafts | |
| #2 | Swimming pools |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lechtenboehmer Hans | 11 |
| #2 | Loebbert Anton | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1045940B | Warp tip made of wire for the construction of the pit, especially the extension of the line | |
| GB760630A | Improvements relating to link linings for roof and wall supporting purposes in mines |