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Scaffold system
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Patent number 4,715,474
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Issue date Dec 29, 1987
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Donald T. Wehmeyer
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Vehicle fluidic drive circuit
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Patent number 4,691,795
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Issue date Sep 8, 1987
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Economy Engineering, Inc.
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Donald T. Wehmeyer
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B60 - VEHICLES IN GENERAL
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Locking device
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Patent number 4,427,093
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Issue date Jan 24, 1984
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Economy Engineering Company
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Donald T. Wehmeyer
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B66 - HOISTING LIFTING HAULING