| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | Austria | 2 | |
| #3 | France | 2 | |
| #4 | Argentina | 1 | |
| #5 | Canada | 1 | |
| #6 | Switzerland | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Sweden | 1 | |
| #9 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Pipes | |
| #3 | Installations for obtaining water | |
| #4 | Foundations and excavations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Meister Karl | 3 |
| #2 | Tischlinger Herrmann | 2 |
| #3 | Ingerle Kurt | 2 |
| #4 | Ingerle K | 1 |
| #5 | Minster K | 1 |
| #6 | Haase Norman Dipl Ing | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE3503853A1 | Process for degritting or regenerating wells, and wells with enlarged capacities | |
| DE2811723A1 | PIPE CONNECTION, IN PARTICULAR FOR DRILL PIPES | |
| US4071087A | Well construction | |
| CA1023655A | Well construction | |
| DE2140603A1 | PROCESS FOR THE PRODUCTION OF PIT ENCLOSURES, SLOPE AND BUILDING SECURING |