| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 5 | |
| #2 | Germany | 3 | |
| #3 | Denmark | 3 | |
| #4 | Canada | 2 | |
| #5 | EPO (European Patent Office) | 2 | |
| #6 | WIPO (World Intellectual Property Organization) | 2 | |
| #7 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Rotary-pistons | |
| #2 | Rotary pistons | |
| #3 | Gearing | |
| #4 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Middlekauff Carle A | 7 |
| #2 | Pippenger John J | 3 |
| #3 | Shaw John D | 2 |
| #4 | Gervais Edward H | 2 |
| #5 | Wescott Donald C | 1 |
| #6 | Nichols Arthur A | 1 |
| #7 | Shaw John Dyer | 1 |
| #8 | Lundstrom Harold R W | 1 |
| #9 | Gervais Edward Henry | 1 |
| #10 | Carle A Middlekauff | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DK531784D0 | Hydraulic engine | |
| EP0124592A1 | Hydraulic torque device | |
| US4501536A | Compact high torque gerotor-type hydraulic motor | |
| DE2922921A1 | INDOOR GEROTOR AND PROCEDURES FOR ITS OPERATION | |
| US4076462A | Combined distributor and bypass valve for fluid actuated pump or motor | |
| US3623829A | Internal gear set | |
| US2818023A | Metering pump | |
| US2588653A | Floating drive connection for metering pumps | |
| CA912347A | Internal gear set |