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Coiled tubing drilling system
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Patent number 7,753,141
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Issue date Jul 13, 2010
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CMTE Development Limited
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Timothy Gregory Hamilton Meyer
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E21 - EARTH DRILLING MINING
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Directional rod pusher
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Patent number 5,070,948
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Issue date Dec 10, 1991
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The Charles Machine Works, Inc.
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G. Edwin Malzahn
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E21 - EARTH DRILLING MINING
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Directional rod pusher
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Patent number 4,945,999
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Issue date Aug 7, 1990
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The Charles Machine Works, Inc.
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G. Edwin Malzahn
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E21 - EARTH DRILLING MINING
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Earth auger
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Patent number 4,691,787
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Issue date Sep 8, 1987
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Kabushiki Kaisha Iseki Kaihatsu Koki
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Toshio Akesaka
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E21 - EARTH DRILLING MINING
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Drive mechanism for drill
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Patent number 4,431,063
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Issue date Feb 14, 1984
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The Bendix Corporation
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Michael O. Dressel
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E21 - EARTH DRILLING MINING
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-
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Flexible shaft and roof drilling system
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Patent number 4,290,494
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Issue date Sep 22, 1981
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The United States of America as represented by the United States Department o...
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John H. Blanz
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E21 - EARTH DRILLING MINING
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Torquer/thruster
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Patent number 4,273,199
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Issue date Jun 16, 1981
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John H. Blanz
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E21 - EARTH DRILLING MINING
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Torquer/thruster
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Patent number 4,262,756
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Issue date Apr 21, 1981
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John H. Blanz
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E21 - EARTH DRILLING MINING
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Drill drive mechanism
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Patent number 4,172,391
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Issue date Oct 30, 1979
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The United States of America as represented by the United States Department o...
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Michael O. Dressel
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E21 - EARTH DRILLING MINING
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Torquer/thruster for flexible roofdrill
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Patent number 4,128,133
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Issue date Dec 5, 1978
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The United States of America as represented by the Secretary of the Interior
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Hans A. Hug
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E21 - EARTH DRILLING MINING
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3464502
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Patent number 3,464,502
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Issue date Sep 2, 1969
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E21 - EARTH DRILLING MINING
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2610029
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Patent number 2,610,029
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Issue date Sep 9, 1952
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E21 - EARTH DRILLING MINING
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2572465
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Patent number 2,572,465
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Issue date Oct 23, 1951
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E21 - EARTH DRILLING MINING
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2410458
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Patent number 2,410,458
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Issue date Nov 5, 1946
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E21 - EARTH DRILLING MINING
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2331179
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Patent number 2,331,179
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Issue date Oct 5, 1943
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E21 - EARTH DRILLING MINING
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2322237
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Patent number 2,322,237
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Issue date Jun 22, 1943
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E21 - EARTH DRILLING MINING
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2090330
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Patent number 2,090,330
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Issue date Aug 17, 1937
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E21 - EARTH DRILLING MINING
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1860945
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Patent number 1,860,945
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Issue date May 31, 1932
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E21 - EARTH DRILLING MINING
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1860946
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Patent number 1,860,946
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Issue date May 31, 1932
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E21 - EARTH DRILLING MINING
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1768318
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Patent number 1,768,318
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Issue date Jun 24, 1930
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E21 - EARTH DRILLING MINING
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1740761
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Patent number 1,740,761
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Issue date Dec 24, 1929
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E21 - EARTH DRILLING MINING
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1694994
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Patent number 1,694,994
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Issue date Dec 11, 1928
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E21 - EARTH DRILLING MINING
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1684351
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Patent number 1,684,351
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Issue date Sep 11, 1928
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E21 - EARTH DRILLING MINING
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1657339
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Patent number 1,657,339
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Issue date Jan 24, 1928
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E21 - EARTH DRILLING MINING
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1642355
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Patent number 1,642,355
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Issue date Sep 13, 1927
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E21 - EARTH DRILLING MINING