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Robert Brent Maddock
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Cerritos, CA, US
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last 30 patents
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Patent Grant
Flow control valve
Patent number
4,004,613
Issue date
Jan 25, 1977
Dresser Industries, Inc.
Robert Merrill Purton
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Flow control valve for decoking
Patent number
3,964,516
Issue date
Jun 22, 1976
Dresser Industries, Inc.
Robert Merrill Purton
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...