| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 13 | |
| #2 | France | 4 | |
| #3 | Canada | 3 | |
| #4 | Switzerland | 3 | |
| #5 | United States | 3 | |
| #6 | Germany | 2 | |
| #7 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Mechanical elements | |
| #3 | Environmental technology | |
| #4 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Rotary-pistons | |
| #2 | Rotary pistons | |
| #3 | Gearing | |
| #4 | Clutches and brakes | |
| #5 | Vehicle tyre repairing | |
| #6 | Climate change mitigation in transportation | |
| #7 | Internal-combustion piston engines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schmidt Rudolf | 7 |
| #2 | Schmidt Rudolf Ing | 6 |
| #3 | Rudolf Schmidt | 3 |
| #4 | Vaduz Patiag-Patentverwertungs | 2 |
| #5 | Industrie Aktiengesellschaft P | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE557905C | Single-tooth or multi-tooth rotary lobes for machines (pumps) with non-round delivery pistons that work in pairs | |
| US1846692A | Rotary pump and the like | |
| US1834976A | Rotary compressor, pump or the like | |
| GB307498A | Rotary compressor, pump or the like | |
| GB307396A | Hydraulic change speed gear | |
| US1771863A | Rotary pump | |
| DE488069C | Rotary piston machine | |
| CA326208A | Engine with rotary pistons | |
| CA320409A | Rotary pump | |
| CA300195A | Rotary piston engine |