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Relay pilot regulator
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Patent number 4,176,677
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Issue date Dec 4, 1979
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Textron Inc.
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George C. Hughes
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G05 - CONTROLLING REGULATING
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Gas pressure regulator
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Patent number 4,069,839
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Issue date Jan 24, 1978
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Textron Inc.
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George C. Hughes
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G05 - CONTROLLING REGULATING
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Gas pressure regulator
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Patent number 3,989,060
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Issue date Nov 2, 1976
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Textron, Inc.
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George C. Hughes
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G05 - CONTROLLING REGULATING