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2002-02-27
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2000-01-26
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EP0827530A4
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1999-10-27
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1997-03-19
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2001-04-28
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1999-10-25
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1999-09-13
Method of and apparatus for scooping off substances floating on water surface
IL121884A0
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1998-03-10
Filter means and method for the purification of water
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1998-03-10
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1999-05-21
Method of purifying water and apparatus therefor
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1998-10-26
Apparatus for removing pollutants accumulated over and above surface of underground water
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1998-11-25
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2000-04-12
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2005-09-14
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2000-07-17
Method of and apparatus for biologically removing nitrogen compounds from water
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2001-01-03
Ground clearing apparatus and method
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1998-11-13
Method and apparatus for removing water from a watercourse
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2000-04-28
Well-device for periodical purifikation of water in situ
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1999-01-18
Method of and apparatus for removing pollutants from surface of water reservoirs, especially petroleum-derived pollutants
AU6377599A
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2000-04-17
Method and device for purification of surface and sewage water
SI1034138T1
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2004-08-31
Apparatus and method for the purification of water
PL312518A1
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1997-08-04
Method of and apparatus for dynamically scooping off petroleum products floating on surface of ground water
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1998-02-02
Apparatus for scooping surface scum
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1998-08-20
Water prospecting method and apparatus
TW308255U
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1997-06-11
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