| # | Country | Total Patents | |
|---|---|---|---|
| #1 | India | 2 | |
| #2 | United States | 2 | |
| #3 | Australia | 1 | |
| #4 | Brazil | 1 | |
| #5 | Denmark | 1 | |
| #6 | EPO (European Patent Office) | 1 | |
| #7 | Finland | 1 | |
| #8 | Greece | 1 | |
| #9 | Israel | 1 | |
| #10 | Republic of Korea | 1 | |
| #11 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Foundations and excavations | |
| #2 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Drumheller John A | 10 |
| #2 | Krieg Ronald K | 9 |
| #3 | Drumheller John Albert | 1 |
| #4 | Krieg Ronard K | 1 |
| #5 | Krieg Ronald | 1 |
| #6 | Krieg Ronald Karl | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5146987A | Method and apparatus for controlling the flow of crude oil from the earth | |
| US5050386A | Method and apparatus for containment of hazardous material migration in the earth | |
| KR100203194B1 | Cyrogemic barrier confinement system | |
| AU4213689A | Closed cryogenic barrier for containment of hazardous material in the earth |