| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 18 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Transport | |
| #3 | Furniture and games | |
| #4 | Materials and metallurgy |
| # | Technology | |
|---|---|---|
| #1 | Hydraulic engineering | |
| #2 | Ship-lifting devices | |
| #3 | Scaffolding | |
| #4 | Ships | |
| #5 | Devices for public amusement | |
| #6 | Construction of roads | |
| #7 | Vehicle wheels | |
| #8 | Building materials | |
| #9 | Dry-docking of vessels | |
| #10 | Toys |
| Publication | Filing date | Title |
|---|---|---|
| DE337236C | Process for the manufacture of reinforced concrete boats |