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Check valve
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Patent number 4,527,733
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Issue date Jul 9, 1985
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Bimax Controls, Inc.
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Arthur H. Anderson
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F24 - HEATING RANGES VENTILATING
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Solar heater system and valve
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Patent number 4,454,890
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Issue date Jun 19, 1984
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Actrol Industries Pty. Ltd.
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Marcus F. Schoenheimer
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F24 - HEATING RANGES VENTILATING
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Heat exchanger
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Patent number 4,376,459
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Issue date Mar 15, 1983
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Diesel Kiki Co., Ltd.
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Masaru Nagashima
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F24 - HEATING RANGES VENTILATING
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3776272
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Patent number 3,776,272
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Issue date Dec 4, 1973
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F24 - HEATING RANGES VENTILATING
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3207438
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Patent number 3,207,438
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Issue date Sep 21, 1965
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F24 - HEATING RANGES VENTILATING
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1969315
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Patent number 1,969,315
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Issue date Aug 7, 1934
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F24 - HEATING RANGES VENTILATING
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1806393
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Patent number 1,806,393
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Issue date May 19, 1931
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F24 - HEATING RANGES VENTILATING
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1643451
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Patent number 1,643,451
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Issue date Sep 27, 1927
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F24 - HEATING RANGES VENTILATING
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1606108
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Patent number 1,606,108
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Issue date Nov 9, 1926
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F24 - HEATING RANGES VENTILATING
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1535371
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Patent number 1,535,371
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Issue date Apr 28, 1925
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F24 - HEATING RANGES VENTILATING