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Grenville K. Yuill
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Winnipeg, Manitoba, CA
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last 30 patents
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Patent Grant
Extracting radon gases from a domestic water supply
Patent number
4,756,724
Issue date
Jul 12, 1988
Grenville K. Yuill
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Patent Grant
Gas-sealing insert for floor drains
Patent number
4,744,109
Issue date
May 17, 1988
Grenville K. Yuill
E03 - WATER SUPPLY SEWERAGE