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Hydraulic cylinder
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Patent number 4,718,330
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Issue date Jan 12, 1988
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Eltra Corporation
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Bruce W. Mitton
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Push-pull door latch
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Patent number 4,629,228
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Issue date Dec 16, 1986
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Universal Industrial Products Co. (Div. of Core Industries, Inc.)
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Neil L. Marko
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Anti-supercharge pressure valve
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Patent number 4,343,153
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Issue date Aug 10, 1982
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Eltra Corporation
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Calvin V. Kern
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F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL