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Patents Grantslast 30 patents

Information Patent Grant
Filling material for percolating filters for the treatment of fluid...
- Patent number 5,997,972
- Issue date Dec 7, 1999
- Norddeutsche Seekabelwerke Aktiengesellschart
- Hartwig Basse
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE