John Filby

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Edmonton, CA

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Patents Grantslast 30 patents

Information Patent Grant
Purification of water for boiler
- Patent number 4,098,691
- Issue date Jul 4, 1978
- Her Majesty the Queen in right of Canada, as represented by the Minister of E...
- John Filby
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE