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Warren D. Poole
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St. Paul, MN, US
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last 30 patents
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Patent Grant
Floating nitrification reactor in a treatment pond
Patent number
5,421,999
Issue date
Jun 6, 1995
The Lemna Corporation
Warren D. Poole
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Floating aquatic plant treatment system
Patent number
5,409,601
Issue date
Apr 25, 1995
The Lemna Corporation
Viet H. Ngo
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Floating aquatic plant treatment system with porous system
Patent number
5,342,512
Issue date
Aug 30, 1994
The Lemma Corporation
Viet H. Ngo
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Floating aquatic plant water treatment system with sprayer system
Patent number
5,264,127
Issue date
Nov 23, 1993
The Lemna Corporation
Viet H. Ngo
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Floating aquatic plant water treatment system
Patent number
5,180,501
Issue date
Jan 19, 1993
The Lemna Corporation
Viet H. Ngo
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information
Patent Grant
Floating aquatic plant water treatment system
Patent number
5,096,577
Issue date
Mar 17, 1992
The Lemna Corporation
Viet H. Ngo
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE