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Roll-stand brake
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Patent number 5,503,349
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Issue date Apr 2, 1996
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Certek Corporation
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Allan Chertok
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Windpower system
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Patent number 4,490,093
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Issue date Dec 25, 1984
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U.S. Windpower, Inc.
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Allan Chertok
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Document printer
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Patent number 4,162,651
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Issue date Jul 31, 1979
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Concord Computing Corporation
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Allan Chertok
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B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS