| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 9 | |
| #2 | Belgium | 3 | |
| #3 | Switzerland | 2 | |
| #4 | Spain | 1 | |
| #5 | United Kingdom | 1 | |
| #6 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Electrical machinery and energy | |
| #3 | Mechanical elements | |
| #4 | Transport |
| # | Name | Total Patents |
|---|---|---|
| #1 | Marc Pancol | 2 |
| #2 | Andre Vandenesch | 2 |
| #3 | Vandenesch Andre | 1 |
| #4 | Pancol Marc | 1 |
| Publication | Filing date | Title |
|---|---|---|
| FR2254213A6 | Adjustable height manhole cover - has frame resting granules covered with a bituminous layer | |
| FR2250356A5 | Variable height key operated manhole lock - has sliding tubular body supported on rings resting on housing shoulder | |
| GB1318412A | Manhole cover frame | |
| ES275441A3 | Improvements in adjustable wrenches in height for faucet or gate (Machine-translation by Google Translate, not legally binding) |