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Membrane pack and method of making
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Patent number 4,576,715
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Issue date Mar 18, 1986
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Dresser Industries, Inc.
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John M. Michaels
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Microstrainer apparatus and method
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Patent number 4,246,108
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Issue date Jan 20, 1981
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Dresser Industries, Inc.
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Gerald A. Croopnick
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Purification apparatus
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Patent number 4,025,425
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Issue date May 24, 1977
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Dresser Industries, Inc.
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Gerald Allan Croopnick
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL