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John Kaal Martin
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Sugarland, TX, US
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last 30 patents
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Patent Grant
Double-acting, deep-well fluid extraction pump
Patent number
5,797,452
Issue date
Aug 25, 1998
John Kaal Martin
E21 - EARTH DRILLING MINING
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Patent Grant
Deep-well fluid-extraction pump
Patent number
5,651,666
Issue date
Jul 29, 1997
John Kaal Martin
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...