| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 4 | |
| #2 | United States | 3 | |
| #3 | Germany | 2 | |
| #4 | WIPO (World Intellectual Property Organization) | 2 | |
| #5 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Transport | |
| #3 | Measurement | |
| #4 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Sewers | |
| #2 | Water-closets with flushing devices | |
| #3 | Siphons | |
| #4 | Measuring volume | |
| #5 | Vehicle parts | |
| #6 | Railway bodies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Claas Oliver | 5 |
| #2 | Woermcke Hans | 2 |
| #3 | Haatanen Rauno | 2 |
| #4 | Woermcke Hans H | 1 |
| #5 | Woermcke Hans Heinrich Klaus | 1 |
| #6 | Haatanen Rauno O | 1 |
| #7 | Becker Juergen | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO9832929A1 | Vacuum toilet | |
| EP0823513A2 | Vacuum toilet and device for the removal of fluids and solids from the funnel shaped bowl of the vacuum toilet | |
| DE19721255A1 | Measuring appts. for determining fullness or fill height esp. of fluid in container | |
| EP0732456A2 | Toilet comprising bowl and housing | |
| DE19516740A1 | Vacuum toilet system | |
| WO9416158A1 | Device for controlling the operation of a vacuum toilet | |
| US5396668A | System for discharging wastes |