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3928145
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Patent number 3,928,145
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Issue date Dec 23, 1975
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3893299
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Patent number 3,893,299
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Issue date Jul 8, 1975
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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3864917
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Patent number 3,864,917
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Issue date Feb 11, 1975
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F24 - HEATING RANGES VENTILATING
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3863709
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Patent number 3,863,709
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Issue date Feb 4, 1975
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F24 - HEATING RANGES VENTILATING
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3676078
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Patent number 3,676,078
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Issue date Jul 11, 1972
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C01 - INORGANIC CHEMISTRY
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3661424
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Patent number 3,661,424
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Issue date May 9, 1972
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F24 - HEATING RANGES VENTILATING
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3490513
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Patent number 3,490,513
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Issue date Jan 20, 1970
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F24 - HEATING RANGES VENTILATING
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3470943
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Patent number 3,470,943
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Issue date Oct 7, 1969
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F24 - HEATING RANGES VENTILATING
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3421794
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Patent number 3,421,794
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Issue date Jan 14, 1969
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E21 - EARTH DRILLING MINING
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3386768
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Patent number 3,386,768
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Issue date Jun 4, 1968
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E21 - EARTH DRILLING MINING
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3363664
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Patent number 3,363,664
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Issue date Jan 16, 1968
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F24 - HEATING RANGES VENTILATING
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3348883
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Patent number 3,348,883
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Issue date Oct 24, 1967
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E21 - EARTH DRILLING MINING
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3347753
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Patent number 3,347,753
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Issue date Oct 17, 1967
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3274769
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Patent number 3,274,769
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Issue date Sep 27, 1966
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F24 - HEATING RANGES VENTILATING
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3248307
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Patent number 3,248,307
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Issue date Apr 26, 1966
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3220470
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Patent number 3,220,470
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Issue date Nov 30, 1965
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3206866
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Patent number 3,206,866
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Issue date Sep 21, 1965
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F26 - DRYING
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3195619
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Patent number 3,195,619
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Issue date Jul 20, 1965
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F24 - HEATING RANGES VENTILATING
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3140986
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Patent number 3,140,986
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Issue date Jul 14, 1964
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F24 - HEATING RANGES VENTILATING
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3138546
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Patent number 3,138,546
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Issue date Jun 23, 1964
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F24 - HEATING RANGES VENTILATING
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3135466
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Patent number 3,135,466
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Issue date Jun 2, 1964
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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3127330
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Patent number 3,127,330
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Issue date Mar 31, 1964
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3096257
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Patent number 3,096,257
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Issue date Jul 2, 1963
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3060119
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Patent number 3,060,119
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Issue date Oct 23, 1962
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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2877164
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Patent number 2,877,164
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Issue date Mar 10, 1959
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE