| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 5 | |
| #2 | United States | 5 | |
| #3 | Australia | 4 | |
| #4 | WIPO (World Intellectual Property Organization) | 4 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology | |
| #2 | Chemical engineering | |
| #3 | Machines | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Climate change mitigation in wastewater treatment | |
| #2 | Water treatment | |
| #3 | Unspecified technologies | |
| #4 | Separation | |
| #5 | Shafts | |
| #6 | Mining |
| # | Name | Total Patents |
|---|---|---|
| #1 | Pollock David C | 16 |
| #2 | Mraz Dennis | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US5660724A | Multi-pressure head tank for use with vertical shaft bioreactors | |
| US5645726A | Treatment of waste liquor in a vertical shaft bioreactor | |
| US5651892A | Biodegradeable effluent nutrient removal | |
| US5650070A | Aerobic long vertical shaft bioreactors | |
| US5513903A | Method and apparatus for developing shafts using small diameter shafts |