| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 5 | |
| #2 | United Kingdom | 3 | |
| #3 | Austria | 2 | |
| #4 | Switzerland | 2 | |
| #5 | Spain | 2 | |
| #6 | Canada | 1 | |
| #7 | Germany | 1 | |
| #8 | France | 1 | |
| #9 | Netherlands | 1 | |
| #10 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Ships | |
| #2 | Measuring distances | |
| #3 | Dry-docking of vessels |
| # | Name | Total Patents |
|---|---|---|
| #1 | Alfsen Harald | 17 |
| Publication | Filing date | Title |
|---|---|---|
| GB115401A | Improvements in the Casting of Reinforced Concrete Vessels. | |
| GB120190A | Improvements in or relating to the Casting of Reinforced Concrete Ships or like Vessels. | |
| GB108666A | Improvements in connection with the Building and Launching of Reinforced Concrete Boats. | |
| CA180561A | Ship construction | |
| US1258175A | Method of building and launching floating craft. | |
| DK23644C | Procedure for the Construction and Drainage of Ships, in particular Concrete Ships. |