| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 13 | |
| #2 | United Kingdom | 3 | |
| #3 | Austria | 2 | |
| #4 | Germany | 2 | |
| #5 | France | 1 | |
| #6 | Italy | 1 | |
| #7 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Packaging and shipping | |
| #3 | Mechanical elements | |
| #4 | Environmental technology |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hans Ryffel | 10 |
| #2 | Ryffel Hans | 7 |
| #3 | Hansu Riyutsufueru | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CH661096A5 | Vane cell machine | |
| CH634385A5 | Sliding-vane machine | |
| CH596434A5 | Hydraulic rotary piston unit | |
| GB1048217A | Improvements in rotary pumps of the meshing screw type | |
| GB991467A | Improvements in sealing arrangements comprising sliding sealing rings | |
| GB935407A | Improvements in or relating to rotary piston compressors |