John A. Hobson

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Patents Grantslast 30 patents

Information Patent Grant
Treatment of water, sewage and like waste liquids
- Patent number 5,494,581
- Issue date Feb 27, 1996
- WRc p.l.c.
- John A. Hobson
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE