| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 12 | |
| #2 | Canada | 1 | |
| #3 | Switzerland | 1 | |
| #4 | Spain | 1 | |
| #5 | United Kingdom | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Engines, pumps and turbines | |
| #3 | Machines | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Internal-combustion piston engines | |
| #2 | Locks | |
| #3 | Unspecified technologies | |
| #4 | Climate change mitigation in transportation |
| # | Name | Total Patents |
|---|---|---|
| #1 | Nielsen Niels Peter | 15 |
| #2 | Niels Peter Nielsen | 1 |
| #3 | Sophus Carl | 1 |
| #4 | Niels Leopold Bressendorf | 1 |
| #5 | Nielsen Jens Ejler Severin | 1 |
| #6 | Murphy Junius L | 1 |
| #7 | Petersen Carl Sophus | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA150517A | Two-cycle engine | |
| GB191128866A | Improvements relating to Two Cycle Internal Combustion Engines. | |
| US650267A | Combination-lock. |