| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 22 | |
| #2 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Consumer goods | |
| #3 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Ships | |
| #2 | Protective garments | |
| #3 | Machines for making clocks |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hart Hans | 9 |
| #2 | Hans Hart | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US1822810A | Devices for tautening the cover of folding boats | |
| US1817557A | Folding boat |