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Oil spill recovery system
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Patent number 5,169,519
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Issue date Dec 8, 1992
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Norman E. Elsas
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Towel cutting machine
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Patent number 4,375,175
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Issue date Mar 1, 1983
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Nemo Industries, Inc.
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Norman E. Elsas
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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Quilted material mending system
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Patent number 4,061,096
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Issue date Dec 6, 1977
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Louisville Bedding Company
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Norman E. Elsas
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D05 - SEWING EMBROIDERING TUFTING
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