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Trap apparatus with bypass
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Patent number 5,357,755
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Issue date Oct 25, 1994
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Donaldson Company, Inc.
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Gary R. Gillingham
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Trap apparatus with bypass
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Patent number 5,212,948
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Issue date May 25, 1993
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Donaldson Company, Inc.
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Gary R. Gillingham
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Active silencer
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Patent number 4,805,733
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Issue date Feb 21, 1989
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Nippondenso Co., Ltd.
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Masahiko Kato
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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3236045
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Patent number 3,236,045
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Issue date Feb 22, 1966
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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2995204
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Patent number 2,995,204
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Issue date Aug 8, 1961
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F24 - HEATING RANGES VENTILATING