| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 2 | |
| #2 | Switzerland | 2 | |
| #3 | Brazil | 1 | |
| #4 | Canada | 1 | |
| #5 | Germany | 1 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | Spain | 1 | |
| #8 | France | 1 | |
| #9 | United Kingdom | 1 | |
| #10 | Italy | 1 | |
| #11 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines | |
| #2 | Machines | |
| #3 | Basic materials chemistry | |
| #4 | Chemical engineering |
| # | Technology | |
|---|---|---|
| #1 | Rotary-pistons | |
| #2 | Unspecified technologies | |
| #3 | Separation | |
| #4 | Liquid hydrocarbon mixture production |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zweifel A | 2 |
| #2 | Zweifel Antonio | 2 |
| #3 | Fweifel A | 1 |
| #4 | Zweifel Antonio Dipl Ing | 1 |
| #5 | Goepfert Peter Dipl-Ing | 1 |
| #6 | Goepfert Peter | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0092590A1 | Process for the removal of condensed water from the injecion oil of a rotary or screw compressor, and rotary or screw compressor | |
| AU4938872A | Single-stage or multistage rotary compressor | |
| US3820923A | Single stage or multistage rotary compressor |