| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 2 | |
| #2 | Belgium | 1 | |
| #3 | Brazil | 1 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Germany | 1 | |
| #7 | EPO (European Patent Office) | 1 | |
| #8 | Japan | 1 | |
| #9 | USSR (Union of Socialist Soviet Republics) | 1 | |
| #10 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Foundations and excavations | |
| #2 | Analysing materials | |
| #3 | Earth drilling |
| # | Name | Total Patents |
|---|---|---|
| #1 | Coelus Gaspar | 4 |
| #2 | Coelus G | 2 |
| #3 | Willaert Andre | 1 |
| #4 | Gasuparu Koeru | 1 |
| #5 | Kelyu Gaspar | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0023167A1 | Method and apparatus for the dynamic testing of piles | |
| DE1918856A1 | DISPLACEMENT DRILL HEAD |