| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 1 | |
| #2 | Brazil | 1 | |
| #3 | Germany | 1 | |
| #4 | EPO (European Patent Office) | 1 | |
| #5 | France | 1 | |
| #6 | Italy | 1 | |
| #7 | Japan | 1 | |
| #8 | Netherlands | 1 | |
| #9 | Norway | 1 | |
| #10 | Sweden | 1 | |
| #11 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Non-positive-displacement pumps | |
| #2 | Aeroplanes | |
| #3 | Marine propulsion | |
| #4 | Spring or inertia motors |
| # | Name | Total Patents |
|---|---|---|
| #1 | Spijkstra Sjoerd | 6 |
| #2 | Sujieerudo Supiokusutora | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0427722A1 | Propulsion device | |
| AU3363389A | Propulsion device | |
| JPS5488595A | Propelling device |