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Deck structure for floating dock
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Patent number 5,199,371
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Issue date Apr 6, 1993
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The Louis Berkman Company
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Jon D. Meriwether
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Door closing mechanism
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Patent number 5,061,022
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Issue date Oct 29, 1991
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The Louis Berkman Company
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Jon D. Meriwether
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Filled float drum
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Patent number 4,974,538
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Issue date Dec 4, 1990
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The Louis Berkman Company
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Jon D. Meriwether
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Modular float drum system
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Patent number 4,928,617
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Issue date May 29, 1990
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The Louis Berkman Company
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Jon D. Meriwether
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Modular float drum system
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Patent number 4,799,445
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Issue date Jan 24, 1989
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Follansbee Steel Corporation
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Jon D. Meriwether
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Hinge connector for floating dock
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Patent number 4,683,833
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Issue date Aug 4, 1987
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Follansbee Steel Corporation
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Jon D. Meriwether
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING