| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Sweden | 5 | |
| #2 | Germany | 2 | |
| #3 | United States | 2 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Italy | 1 | |
| #8 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Control | |
| #4 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Servomotors | |
| #2 | Unspecified technologies | |
| #3 | Systems controlling non-electric variables | |
| #4 | Rotary-pistons | |
| #5 | Control or regulating systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Joelson Karl Evert | 7 |
| #2 | Joelson Karl E | 3 |
| #3 | Kaaru Ebuaato Jiyoeruson | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB8620773D0 | Gear pump in a hydraulic actuator control | |
| US4444090A | Governing means for a hydraulic actuator | |
| US4219181A | Fluid flow governing valve means |