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Rotary noise attenuator
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Patent number 5,400,825
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Issue date Mar 28, 1995
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Fisher Controls International, Inc.
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Douglas P. Gethmann
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Rotary noise attenuator
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Patent number 5,332,004
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Issue date Jul 26, 1994
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Fisher Controls International, Inc.
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Douglas P. Gethmann
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Rotary noise attenuator
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Patent number 5,193,583
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Issue date Mar 16, 1993
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Fisher Controls International, Inc.
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Douglas P. Gethmann
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...