| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Japan | 8 | |
| #2 | United States | 5 | |
| #3 | EPO (European Patent Office) | 3 | |
| #4 | Switzerland | 2 | |
| #5 | Mexico | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machine tools | |
| #3 | Machines | |
| #4 | Thermal processes | |
| #5 | Transport | |
| #6 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Rotary pistons | |
| #2 | Pumps | |
| #3 | Unspecified technologies | |
| #4 | Rotary-pistons | |
| #5 | Vehicle air-treating devices | |
| #6 | Refrigerators | |
| #7 | Making screws | |
| #8 | Metal-working | |
| #9 | Making forged metal products | |
| #10 | Pistons and sealings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Obrist Frank | 10 |
| #2 | Kuhn Peter | 7 |
| #3 | Frey Michael | 6 |
| #4 | Furanku Oburisuto | 4 |
| #5 | Peetaa Kuun | 3 |
| #6 | Kuhn Peter Prof Dr-Ing | 2 |
| #7 | Otsutoo Kuraitsu | 1 |
| #8 | Furanku Oburiisuto | 1 |
| #9 | Furanku Opurisuto | 1 |
| #10 | Peteru Kuun | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CH685450A5 | Internal-axis rotary piston engine. | |
| CH685447A5 | Internal-axis rotary piston engine. | |
| US5147194A | Rotary piston machine with a protuberance in the cylinder wall | |
| US5178529A | Seal formed of plastic layer having outwardly open depressions |