| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | Switzerland | 3 | |
| #3 | France | 3 | |
| #4 | Spain | 1 | |
| #5 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Construction of roads | |
| #2 | Hydraulic engineering | |
| #3 | Cranes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lehnen Walter | 5 |
| #2 | Walter Lehnen | 2 |
| #3 | Heinz Huismann | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1658549A1 | Paver or armor stone with simultaneous horizontal and vertical connection on all sides | |
| DE1634177A1 | Process for the production of dyke revetments or the like. | |
| DE1634176A1 | Bank revetment made of concrete composite blocks with vertical bond | |
| DE1534400A1 | Composite paving stone | |
| ES318580A1 | Improvements in or relating to paving stones | |
| DE1534572A1 | Composite edge beams for roads |