| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Environmental technology | |
| #3 | Basic communication technologies | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Construction of roads | |
| #2 | Hydraulic engineering | |
| #3 | Climate change adaptation technologies | |
| #4 | Generation of oscillations | |
| #5 | Shaping clay |
| # | Name | Total Patents |
|---|---|---|
| #1 | Barth Guenter | 5 |
| #2 | Langsdorff Fritz Von | 4 |
| #3 | Barth Guenter Dr | 1 |
| #4 | Von Langsdorff Fritz | 1 |
| #5 | Langsdorff F Von | 1 |
| #6 | Barth G | 1 |
| #7 | Von Langsdorff F | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4128357A | Slab-elements for covering the ground | |
| CH611376A5 | Floor-covering element | |
| DE2713354A1 | Octagonal headed interlocking concrete paving stone - has crenellated line outside inner face of imaginary base square | |
| DE2515210A1 | FLOORING ELEMENT, ESPECIALLY MADE OF CONCRETE |