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Douglas B. Firestone
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Santee, CA, US
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last 30 patents
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Patent Grant
Rotary vane pump
Patent number
5,616,020
Issue date
Apr 1, 1997
Quik Pump, Inc.
Douglas B. Firestone
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Grant
Pipe repair assembly
Patent number
4,889,370
Issue date
Dec 26, 1989
Douglas B. Firestone
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...