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Method of forming closure liners
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Patent number 4,081,503
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Issue date Mar 28, 1978
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W. R. Grace & Co.
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Keith Shotbolt
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Articulate conduit connector
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Patent number 4,040,650
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Issue date Aug 9, 1977
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Comex Marine Services, Inc.
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Keith Shotbolt
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Connector apparatus
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Patent number 3,999,782
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Issue date Dec 28, 1976
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Comex Marine Services, Inc.
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Keith Shotbolt
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E21 - EARTH DRILLING MINING
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Closure lining machine
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Patent number 3,963,396
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Issue date Jun 15, 1976
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W. R. Grace & Co.
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Keith Shotbolt
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL