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Convertible rowing apparatus
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Patent number 10,786,703
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Issue date Sep 29, 2020
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John C. Zimmer
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Weld-less compactor
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Patent number 10,415,615
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Issue date Sep 17, 2019
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Tech Oil Products, Inc.
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John C. Zimmer
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Misting fan system and method
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Patent number 9,435,555
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Issue date Sep 6, 2016
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Tech Oil Products, Inc.
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John C. Zimmer
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F24 - HEATING RANGES VENTILATING