| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 10 | |
| #2 | United States | 2 | |
| #3 | Austria | 1 | |
| #4 | Belgium | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Rotary-pistons |
| # | Name | Total Patents |
|---|---|---|
| #1 | Spindler Walter G | 1 |
| #2 | Spindler W | 1 |
| #3 | Spindler Walter | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4068984A | Multi-stage screw-compressor with different tooth profiles | |
| DE2409554A1 | Rotors in screw compressor - formed by glass fibre reinforced heat resistant polyamide injected on metal shaft | |
| US3867076A | Screw compressor with rotor sections |