| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | United States | 2 | |
| #4 | Australia | 1 | |
| #5 | WIPO (World Intellectual Property Organization) | 1 | |
| #6 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Rotary pistons | |
| #2 | Hot gas positive-displacement engine plants | |
| #3 | Rotary-pistons |
| # | Name | Total Patents |
|---|---|---|
| #1 | Densch Dietrich | 7 |
| #2 | Densch Dietrich Dipl Ing | 3 |
| #3 | Densch Dietrich Dipl-Ing | 2 |
| Publication | Filing date | Title |
|---|---|---|
| EP0784147A1 | Rotary piston machine | |
| DE19603669A1 | Rotary piston machine with sealing rods | |
| EP0339034A1 | Rotary piston machine with sealing elements. | |
| DE3709030A1 | Rotary engine with seals | |
| DE3709014A1 | Stirling engine with rotary piston situated in a gas-tight inner chamber of a housing | |
| ZA8403864B | Stepped-disc pump | |
| EP0129066A2 | Stepped discs pump | |
| DE3332707A1 | Internal combustion engine |