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VISSER & SMIT HANAB BV
| VISSER & SMIT HANAB BV Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20110017451 | PIT AND RELATED COVERED FILTER TUBE - This invention relates to a method to make a pit to withdraw or store or infiltrate water; a pit to withdraw or store or infiltrate water; a method to withdraw water from a water bearing package or to store or infiltrate water, particularly wherein use is made of a filter tube contrary to a drainage tube. The filter tube can be provided with a sheath/jacket of filter sand of gravel. | 01-27-2011 |