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Adjustable lattice girder
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Patent number 11,242,750
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Issue date Feb 8, 2022
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FCI Holdings Delaware, Inc.
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John C. Stankus
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E21 - EARTH DRILLING MINING
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-
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Clamp for elongate members
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Patent number 4,665,593
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Issue date May 19, 1987
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British Steel Corporation
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Colin M. Davies
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E21 - EARTH DRILLING MINING
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-
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Connector for bolted joints
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Patent number 4,160,609
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Issue date Jul 10, 1979
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Hollybank Engineering Company Limited
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David B. Jackson
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E21 - EARTH DRILLING MINING
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-
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Profile steel
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Patent number 4,050,212
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Issue date Sep 27, 1977
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Hoesch Werke Aktiengesellschaft
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Franz Gantke
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E21 - EARTH DRILLING MINING
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Yieldable joint
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Patent number 4,018,054
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Issue date Apr 19, 1977
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Armco Steel Corporation
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Robert S. Standley
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E21 - EARTH DRILLING MINING
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3462959
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Patent number 3,462,959
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Issue date Aug 26, 1969
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E21 - EARTH DRILLING MINING
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3395542
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Patent number 3,395,542
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Issue date Aug 6, 1968
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E21 - EARTH DRILLING MINING
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3126708
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Patent number 3,126,708
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Issue date Mar 31, 1964
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E21 - EARTH DRILLING MINING
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3076672
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Patent number 3,076,672
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Issue date Feb 5, 1963
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E21 - EARTH DRILLING MINING
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3062573
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Patent number 3,062,573
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Issue date Nov 6, 1962
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E21 - EARTH DRILLING MINING
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3023862
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Patent number 3,023,862
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Issue date Mar 6, 1962
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E21 - EARTH DRILLING MINING
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3022100
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Patent number 3,022,100
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Issue date Feb 20, 1962
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E21 - EARTH DRILLING MINING
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3004637
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Patent number 3,004,637
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Issue date Oct 17, 1961
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E21 - EARTH DRILLING MINING
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2867303
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Patent number 2,867,303
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Issue date Jan 6, 1959
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E21 - EARTH DRILLING MINING
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2793719
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Patent number 2,793,719
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Issue date May 28, 1957
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E21 - EARTH DRILLING MINING
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2242961
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Patent number 2,242,961
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Issue date May 20, 1941
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E21 - EARTH DRILLING MINING
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2197567
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Patent number 2,197,567
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Issue date Apr 16, 1940
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E21 - EARTH DRILLING MINING
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1953145
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Patent number 1,953,145
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Issue date Apr 3, 1934
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E04 - BUILDING
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1858719
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Patent number 1,858,719
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Issue date May 17, 1932
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E21 - EARTH DRILLING MINING