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Ionization gauge
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Patent number 7,295,015
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Issue date Nov 13, 2007
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Brooks Automation, Inc.
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Paul C. Arnold
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G01 - MEASURING TESTING
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Ionization gauge
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Patent number 7,030,619
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Issue date Apr 18, 2006
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Brooks Automation, Inc.
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Paul C. Arnold
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G01 - MEASURING TESTING
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Vacuum gauge
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Patent number 4,636,680
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Issue date Jan 13, 1987
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Granville-Phillips Company
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Daniel G. Bills
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H01 - BASIC ELECTRIC ELEMENTS
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Vacuum gauge
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Patent number 4,307,323
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Issue date Dec 22, 1981
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Granville-Phillips Company
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Daniel G. Bills
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H01 - BASIC ELECTRIC ELEMENTS